diff --git a/source/Enderal DLL/src/CheckInvalidForms.h b/source/Enderal DLL/src/CheckInvalidForms.h
index b45bdb6a8..a2d28fb1d 100644
--- a/source/Enderal DLL/src/CheckInvalidForms.h	
+++ b/source/Enderal DLL/src/CheckInvalidForms.h	
@@ -63,615 +63,6 @@ inline void CheckWorldspaces()
 	}
 }
 
-inline void CheckSkyrimCells()
-{
-	// FormIDs of all Skyrim cells.
-	// 9 of them are commented out, because they are cells in Enderal as well.
-
-	uint32_t formids[574] = {
-		0x0004B8FB,
-		0x000352C7,
-		0x000161E7,
-		0x00013A73,
-		0x000BA599,
-		0x00042BED,
-		0x000361F9,
-		0x00016A11,
-		0x000152A1,
-		0x0001523D,
-		0x000A8B23,
-		0x000918D3,
-		0x0004761B,
-		//0x0003CBCB,
-		0x00016A07,
-		0x00015233,
-		0x000138CF,
-		0x0009CCDD,
-		0x0008B84D,
-		0x0003EA9D,
-		0x000198DD,
-		0x000165B1,
-		0x00015229,
-		0x000D9DC7,
-		0x000965B3,
-		0x0006F3EB,
-		0x000466CB,
-		0x000165A7,
-		0x00015283,
-		0x000139E7,
-		0x000EF325,
-		0x000AD5A1,
-		0x00016BDD,
-		0x00015279,
-		0x00015215,
-		0x00013979,
-		0x0007BEF7,
-		0x0004E227,
-		0x000240B7,
-		0x00016BD3,
-		0x00016787,
-		0x0001526F,
-		0x0005015D,
-		0x0002E521,
-		0x0001677D,
-		0x00016205,
-		0x00015265,
-		0x00015201,
-		0x00013901,
-		0x0007BC27,
-		0x0002D3E7,
-		0x0001B147,
-		0x0001A337,
-		0x000196B7,
-		0x000161FB,
-		0x00013A87,
-		0x00033779,
-		0x0002D5D1,
-		0x000161F1,
-		0x00015251,
-		0x00013A7D,
-		//0x00030442,
-		0x000152AA,
-		0x00013A72,
-		0x000571B4,
-		0x00042BEC,
-		0x00037EE0,
-		0x00016A10,
-		0x000152A0,
-		0x0001523C,
-		0x00013A68,
-		0x00013810,
-		0x0001DB4E,
-		0x00016A06,
-		0x00015296,
-		0x000138CE,
-		0x0001528C,
-		0x000371DE,
-		0x00036A72,
-		0x000165A6,
-		//0x00015282,
-		0x00013856,
-		0x000EF324,
-		0x000EB440,
-		0x0009B238,
-		0x00081DEC,
-		0x0007144C,
-		0x0005DE24,
-		0x000597D4,
-		0x00016BDC,
-		0x00013978,
-		0x00065AB6,
-		0x0001D09A,
-		0x00016BD2,
-		0x00016786,
-		0x0001526E,
-		0x0001520A,
-		0x000139D2,
-		0x000F39C4,
-		0x000A9194,
-		0x0005015C,
-		0x00035604,
-		0x00033D68,
-		0x0001677C,
-		0x00016204,
-		0x00015200,
-		0x000B6BE6,
-		0x000A95D6,
-		0x0009AA4A,
-		0x0006C3B6,
-		0x000152BE,
-		0x000151F6,
-		0x00013A86,
-		0x0001382E,
-		0x0001AB60,
-		0x00019454,
-		0x000161F0,
-		0x000152B4,
-		0x00013A7C,
-		0x000F7631,
-		0x00053081,
-		0x000529DD,
-		0x0003538D,
-		0x00013A71,
-		0x000138E1,
-		0x001037E7,
-		0x0005C483,
-		0x00047817,
-		0x00022F53,
-		0x00016DF7,
-		0x00016A0F,
-		0x0001529F,
-		0x00013A67,
-		0x0001380F,
-		0x00016A05,
-		0x00015295,
-		0x00015231,
-		0x00013A5D,
-		0x000138CD,
-		0x0005B91B,
-		0x000165AF,
-		0x00015227,
-		0x0001321F,
-		0x0005D01D,
-		0x000371DD,
-		0x00025195,
-		0x00016EA1,
-		0x00015281,
-		0x0007C98B,
-		0x00052FEB,
-		0x00028EDF,
-		0x000243DF,
-		0x0001F7B3,
-		0x00016BDB,
-		0x00015277,
-		0x00065AB5,
-		0x0005B5DD,
-		0x0003B87D,
-		0x0002D525,
-		0x0002C779,
-		0x00016BD1,
-		0x00016785,
-		0x0001526D,
-		0x000139D1,
-		0x00013909,
-		//0x00000025,
-		0x000AE783,
-		0x000A0877,
-		0x0006CCBB,
-		0x000317E7,
-		0x00016203,
-		0x000A87C5,
-		0x000A0359,
-		0x000152BD,
-		0x000151F5,
-		0x00013A85,
-		0x0001382D,
-		0x00028ACF,
-		0x0001AB5F,
-		0x000161EF,
-		0x00013A7B,
-		0x000547F0,
-		0x00021594,
-		0x000213A0,
-		0x00016E00,
-		0x000152A8,
-		0x00013818,
-		0x00022F52,
-		0x00016DF6,
-		//0x00016A0E,
-		0x00013A66,
-		0x0001380E,
-		0x000B64B4,
-		0x00056E88,
-		0x0001B7C0,
-		0x00016A04,
-		0x00015294,
-		0x00015230,
-		0x00013A5C,
-		0x000138CC,
-		0x00080C6A,
-		0x0005A01A,
-		0x0002031A,
-		0x0001E11E,
-		0x000165AE,
-		0x0001528A,
-		0x00015226,
-		0x00075270,
-		0x0003A184,
-		0x00034B94,
-		0x00015280,
-		0x0001521C,
-		0x00013A48,
-		//0x0010CEEA,
-		0x00016BDA,
-		0x00015276,
-		0x000DB070,
-		0x0003DD34,
-		0x0002D524,
-		0x0002C778,
-		0x0001CB84,
-		0x00016BD0,
-		0x00016784,
-		0x0001526C,
-		0x00015208,
-		0x0001677A,
-		0x00015262,
-		0x00069858,
-		0x00015258,
-		0x000151F4,
-		0x00013A84,
-		0x000B29D6,
-		0x000A6D8E,
-		0x0008CDEE,
-		0x00054D0E,
-		0x000527F2,
-		0x00027552,
-		0x000193EE,
-		0x000161EE,
-		0x0001605E,
-		0x00013A7A,
-		0x000C9DAB,
-		0x000A1793,
-		0x00094BAB,
-		//0x00030313,
-		0x00016DFF,
-		0x000152A7,
-		0x0007FCDD,
-		0x000414DD,
-		0x000399D1,
-		0x00016DF5,
-		0x00016A0D,
-		0x0001529D,
-		0x00015239,
-		0x00013871,
-		0x000F2CAB,
-		0x000A013B,
-		0x0005A857,
-		0x0001AEC3,
-		0x00016A03,
-		0x000165B7,
-		0x0001522F,
-		0x000138CB,
-		0x00013867,
-		0x000165AD,
-		0x00056C1B,
-		//0x000446BF,
-		0x0004401B,
-		0x0003A183,
-		0x000263EF,
-		0x000165A3,
-		0x0001527F,
-		0x0001521B,
-		0x000AB531,
-		0x00083559,
-		0x0005912D,
-		0x00016BD9,
-		0x00015275,
-		0x00015211,
-		0x0003D62B,
-		0x00016BCF,
-		0x0001620B,
-		0x0001526B,
-		0x00015207,
-		0x00013907,
-		0x000A1BFD,
-		0x00052CB5,
-		0x00034B75,
-		0x00016779,
-		0x00015261,
-		0x000EA28B,
-		0x000BBB2F,
-		0x000B1783,
-		0x00079F9F,
-		0x00039F67,
-		0x0002BCD7,
-		0x000270AB,
-		0x000161F7,
-		0x000152BB,
-		0x00015257,
-		0x000151F3,
-		0x00013A83,
-		0x000EEC55,
-		0x000B29D5,
-		0x000161ED,
-		0x000152B1,
-		0x00013A79,
-		0x00016DFE,
-		0x000133CA,
-		0x0006DAA0,
-		0x00052390,
-		0x00016DF4,
-		0x00016A0C,
-		0x0001529C,
-		0x00015238,
-		0x00013870,
-		//0x000B9BC6,
-		0x0005A856,
-		0x0002471A,
-		0x000198E2,
-		0x00016A02,
-		0x000165B6,
-		0x000138CA,
-		0x00059398,
-		0x0003E908,
-		0x000165AC,
-		0x00015288,
-		0x00015224,
-		0x000CAB92,
-		0x0005F536,
-		0x0002A976,
-		0x00016D72,
-		0x0001527E,
-		0x000C7348,
-		0x000AA20C,
-		0x000A73F4,
-		0x00095C44,
-		0x0006E2AC,
-		0x0005D010,
-		0x00018BE0,
-		0x00016BD8,
-		0x0001678C,
-		0x00015274,
-		0x00015210,
-		0x000C0BBA,
-		0x000280C2,
-		0x00016BCE,
-		0x00016782,
-		0x0001526A,
-		0x00015206,
-		0x000F5EDC,
-		0x000ED8E0,
-		0x0007DCFC,
-		0x00018460,
-		0x00016778,
-		0x00016200,
-		0x00015260,
-		0x000151FC,
-		0x00013A8C,
-		0x0005554A,
-		0x00054226,
-		0x0003D35A,
-		0x00037B76,
-		0x000161F6,
-		0x000152BA,
-		0x000151F2,
-		0x000B29D4,
-		0x0003FF10,
-		0x0002E760,
-		0x000161EC,
-		0x000152B0,
-		0x00013A78,
-		0x000ABD31,
-		0x00055215,
-		0x0002954D,
-		0x00016DFD,
-		0x000152A5,
-		0x000133C9,
-		0x0005EAC7,
-		0x00058663,
-		0x000336FB,
-		0x00016DF3,
-		0x00016A0B,
-		0x00015237,
-		0x00077289,
-		0x00075669,
-		//0x0002FD85,
-		0x000165B5,
-		0x0003FC8F,
-		0x000165AB,
-		0x00015223,
-		0x000CAB91,
-		0x00068B99,
-		0x0004C6DD,
-		0x00035299,
-		0x00018BE9,
-		0x0001527D,
-		0x00043FAB,
-		0x00016BD7,
-		0x0001678B,
-		0x00015273,
-		0x000DEBCD,
-		0x00078715,
-		0x0001F359,
-		0x00016781,
-		0x00016209,
-		0x00015269,
-		0x0005B88B,
-		0x0005723B,
-		0x00016777,
-		0x000161FF,
-		0x000152C3,
-		0x0001525F,
-		0x000151FB,
-		0x000A5A71,
-		//0x000A1A61,
-		0x000778F1,
-		0x00045A1D,
-		0x000161F5,
-		0x00015255,
-		0x00013A81,
-		0x000EEC53,
-		0x00081D5B,
-		0x000161EB,
-		0x000152AF,
-		0x00054B70,
-		0x0005258C,
-		0x000471DC,
-		0x0002954C,
-		0x00016DFC,
-		0x00013814,
-		0x000133C8,
-		0x000DBF12,
-		0x000CCDAA,
-		0x00091872,
-		0x00036ED6,
-		0x00016DF2,
-		0x00034BA4,
-		0x0002D4E4,
-		0x00025E24,
-		0x000198E0,
-		0x00016A00,
-		0x00015290,
-		0x0001522C,
-		0x0007947A,
-		0x000165AA,
-		0x00015286,
-		0x000138BE,
-		0x00087764,
-		0x0003B698,
-		0x000165A0,
-		0x0001527C,
-		0x00013850,
-		0x0008E906,
-		0x00071FFE,
-		0x00016BD6,
-		0x000C5AA0,
-		0x0001F358,
-		0x00016780,
-		0x00015268,
-		//0x0002F83E,
-		0x0002529E,
-		0x00016776,
-		0x000161FE,
-		0x000151FA,
-		0x00013A8A,
-		0x00078124,
-		0x000362D8,
-		0x00023FD4,
-		0x0001FA4C,
-		0x000161F4,
-		0x00015254,
-		0x00013A80,
-		0x000BBCB2,
-		0x000AC5D2,
-		0x00081972,
-		0x000261C6,
-		0x000161EA,
-		0x000152AE,
-		0x00013A76,
-		0x00054B6F,
-		0x00032AE7,
-		0x000216BB,
-		0x00016DFB,
-		0x0001523F,
-		0x00013813,
-		0x000133C7,
-		0x00070469,
-		0x00036ED5,
-		0x00034955,
-		0x00016A09,
-		0x00015235,
-		0x0009CCDF,
-		0x0007B7AB,
-		0x0002D4E3,
-		0x000198DF,
-		0x000165B3,
-		0x00097299,
-		0x00089D51,
-		0x000681DD,
-		0x00024771,
-		0x000AF227,
-		0x0007D033,
-		0x00041777,
-		0x00016BDF,
-		0x0001527B,
-		0x00058B4D,
-		0x000275D9,
-		0x000227B9,
-		0x00016BD5,
-		0x00016789,
-		0x000FE47B,
-		0x0001677F,
-		0x00016207,
-		0x00015267,
-		0x001052FD,
-		0x00104871,
-		//0x0002F83D,
-		0x00016775,
-		0x000152C1,
-		0x0001525D,
-		0x000151F9,
-		0x00013A89,
-		0x000961FF,
-		0x0007E00F,
-		0x0004624F,
-		0x000161F3,
-		0x000152B7,
-		0x00015253,
-		0x00013A7F,
-		0x000221B5,
-		0x000161E9,
-		0x000152AD,
-		0x0009174E,
-		0x0004A376,
-		//0x000361FA,
-		0x0002A03A,
-		0x00016DFA,
-		0x000152A2,
-		0x00013812,
-		0x000133C6,
-		0x000DDF7C,
-		0x000A8B24,
-		0x00016A08,
-		0x000138D0,
-		0x0001386C,
-		0x000BE46A,
-		0x0009CCDE,
-		//0x0007284E,
-		0x00067F2A,
-		//0x0003016A,
-		0x000198DE,
-		0x000169FE,
-		0x000165B2,
-		0x0001522A,
-		0x00097298,
-		0x0007614C,
-		0x000165A8,
-		0x00015284,
-		0x00015220,
-		0x000DD216,
-		0x000563E2,
-		0x00050F1E,
-		0x0003F516,
-		0x0003B696,
-		0x00037CC6,
-		0x0003486E,
-		0x0001FC66,
-		0x00016BDE,
-		0x0007BEF8,
-		0x00058B4C,
-		0x00034864,
-		0x000275D8,
-		0x00016BD4,
-		0x00016788,
-		0x0001677E,
-		0x0001383A,
-		0x0002D3E8,
-		0x00016774,
-		0x000161FC,
-		0x000152C0,
-		0x0001525C,
-		0x00013A88,
-		0x00094322,
-		0x000580A2,
-		0x00027F1A,
-		0x0001CE8A,
-		0x00013A7E,
-		0x00039850,
-		0x00027D1C
-	};
-
-	for (int i = 0; i < 574; i++) {
-		const auto* form = RE::TESForm::LookupByID(formids[i]);
-		if (form && form->Is(RE::FormType::Cell)) {
-			logger::warn("Detected invalid cell: {:08X}", formids[i]);
-			NotifyInvalidForm(form);
-		}
-	}
-
-	//memset(formids, 0, sizeof(formids));
-}
-
 inline void CheckCCMods()
 {
 	std::string filenames[73] = {
diff --git a/source/Enderal DLL/src/Main.cpp b/source/Enderal DLL/src/Main.cpp
index 259cce1f9..5fdd20c68 100644
--- a/source/Enderal DLL/src/Main.cpp	
+++ b/source/Enderal DLL/src/Main.cpp	
@@ -14,6 +14,7 @@
 #include "Patches/ForceBorderless.h"
 #include "Patches/AttachLightHitEffectCrash.h"
 #include "Patches/PluginsTxtPatch.h"
+#include "Patches/FormTypeCollisionDetector.h"
 
 using namespace SKSE;
 
@@ -133,7 +134,10 @@ namespace {
 						RE::DebugMessageBox("E - Meshes.bsa is not loaded. Make sure Enderal - Forgotten Stories.esm is enabled and revalidate your files.");
 					}
 
-					CheckIncompatibleMods();
+					// Show any form type collision warnings collected during loading
+					if (!FormTypeCollisionDetector::ShowCollisionWarning()) {
+						CheckIncompatibleMods();
+					}
 				});
 			} else if ((message->type == MessagingInterface::kPostLoadGame && message->data) || message->type == MessagingInterface::kNewGame) {
 				NewGameCount(true);
@@ -186,6 +190,7 @@ SKSEPluginLoad(const LoadInterface* skse) {
 
     Init(skse);
 	InitializeMessaging();
+	FormTypeCollisionDetector::Install();
 	PluginsTxtPatch::Install();
 
 	RE::INISettingCollection::GetSingleton()->GetSetting("sIntroSequence:General")->data.s = nullptr;
diff --git a/source/Enderal DLL/src/Patches/FormTypeCollisionDetector.h b/source/Enderal DLL/src/Patches/FormTypeCollisionDetector.h
new file mode 100644
index 000000000..6d070401a
--- /dev/null
+++ b/source/Enderal DLL/src/Patches/FormTypeCollisionDetector.h	
@@ -0,0 +1,143 @@
+#pragma once
+
+#include <unordered_set>
+#include <unordered_map>
+
+// Detects when a plugin overrides an existing form with a different type
+// This catches Skyrim mods that conflict with Enderal's repurposed form IDs
+//
+// Enderal modifies Skyrim.esm to repurpose many forms with different types.
+// For example, a Skyrim CELL might become an NPC in Enderal.
+// When a Skyrim mod loads, it may try to load form data expecting the original
+// Skyrim type, causing a type mismatch. The game silently skips these, but
+// this detector logs them to help users identify incompatible mods.
+namespace FormTypeCollisionDetector
+{
+	inline std::unordered_set<std::string> flaggedMods;
+	inline bool messageShown = false;
+
+	// Track collisions during loading
+	struct CollisionInfo
+	{
+		RE::FormID formID;
+		RE::FormType existingType;
+		RE::FormType incomingType;
+		std::string modName;
+	};
+	inline std::vector<CollisionInfo> detectedCollisions;
+
+	inline void NotifyCollision(RE::FormID formID, RE::FormType existingType, RE::FormType incomingType, const char* modName)
+	{
+		logger::error("Type collision: {:08X} is {} but {} tries to load it as {}",
+			formID,
+			RE::FormTypeToString(existingType),
+			modName,
+			RE::FormTypeToString(incomingType));
+
+		detectedCollisions.push_back({ formID, existingType, incomingType, modName });
+
+		if (!flaggedMods.contains(modName)) {
+			flaggedMods.insert(modName);
+		}
+	}
+
+	inline bool ShowCollisionWarning()
+	{
+		if (detectedCollisions.empty()) {
+			logger::info("No form type collisions detected");
+			return false;
+		}
+
+		logger::warn("Detected {} form type collision(s) from {} mod(s)",
+			detectedCollisions.size(), flaggedMods.size());
+
+		// Print to console
+		if (auto* console = RE::ConsoleLog::GetSingleton()) {
+			for (const auto& mod : flaggedMods) {
+				console->Print(std::format("{} causes form type collisions (incompatible with Enderal)", mod).c_str());
+			}
+		}
+
+		// Show message box for first mod only
+		if (!messageShown && !flaggedMods.empty()) {
+			messageShown = true;
+			auto firstMod = *flaggedMods.begin();
+			std::string message = std::format(
+				"{} is incompatible with Enderal (form type collision).\n"
+				"Check console for details.", firstMod);
+
+			if (flaggedMods.size() > 1) {
+				message = std::format(
+					"{} and {} other mod(s) are incompatible with Enderal.\n"
+					"Check console for details.",
+					firstMod, flaggedMods.size() - 1);
+			}
+
+			RE::DebugMessageBox(message.c_str());
+		}
+
+		return true;
+	}
+
+	namespace detail
+	{
+		// Helper template for thunk-style call hooks (from po3-Tweaks)
+		template <class T, std::size_t N = 5>
+		void write_thunk_call(std::uintptr_t a_src)
+		{
+			SKSE::AllocTrampoline(14);
+			auto& trampoline = SKSE::GetTrampoline();
+			T::func = trampoline.write_call<N>(a_src, T::thunk);
+		}
+
+		struct LoadFormFromFile
+		{
+			static inline bool firstLog = true;
+
+			static bool thunk(void* a_dataHandler, RE::TESFile* a_file, char a_flags, RE::TESForm* a_existingForm, std::int32_t a_unk)
+			{
+				// Check for type collisions before calling original
+				if (a_file) {
+					RE::FormID formID = a_file->currentform.formID;
+					RE::FormType incomingType = a_file->GetFormType();
+
+					// Log first few calls for debugging
+					if (firstLog) {
+						logger::info("FormTypeCollisionDetector: First form from {} - ID {:08X}, type {}",
+							a_file->fileName, formID, RE::FormTypeToString(incomingType));
+						firstLog = false;
+					}
+
+					// Only check Skyrim.esm forms (mod index 0 in the file)
+					std::uint8_t modIndex = (formID >> 24) & 0xFF;
+
+					if (modIndex == 0 && formID != 0) {
+						// Look up existing form
+						auto* existingForm = a_existingForm ? a_existingForm : RE::TESForm::LookupByID(formID);
+
+						if (existingForm && existingForm->GetFormType() != incomingType) {
+							// Type mismatch detected!
+							const char* modName = a_file->fileName;
+							NotifyCollision(formID, existingForm->GetFormType(), incomingType, modName);
+						}
+					}
+				}
+
+				return func(a_dataHandler, a_file, a_flags, a_existingForm, a_unk);
+			}
+
+			static inline REL::Relocation<decltype(thunk)> func;
+		};
+	}
+
+	inline void Install()
+	{
+		// Hook call to form loading function in the main loading loop
+		// SE: ID 13652 (0x1700E0), call at offset 0x19D to sub_1401703F0
+		// AE: ID 13760 (0x1BB6C0), call at offset 0x271 to sub_1401BBAA0
+		REL::Relocation<std::uintptr_t> target{ REL::RelocationID(13652, 13760), REL::VariantOffset(0x19D, 0x271, 0) };
+		detail::write_thunk_call<detail::LoadFormFromFile>(target.address());
+
+		logger::info("Form type collision detector installed at {:X}", target.address());
+	}
+}
diff --git a/source/Enderal DLL/src/Util.h b/source/Enderal DLL/src/Util.h
index 051396509..88f9b302e 100644
--- a/source/Enderal DLL/src/Util.h	
+++ b/source/Enderal DLL/src/Util.h	
@@ -53,7 +53,6 @@ inline void CheckIncompatibleMods()
 
 	CheckWorldspaces();
 	CheckUnconvertedMap();
-	CheckSkyrimCells();
 }
 
 inline bool PapyrusGlobalFunctionExists(const char* scriptName, const char* funcName)