diff --git a/langs/en-ca.json b/langs/en-ca.json
index 2600103..819956c 100644
--- a/langs/en-ca.json
+++ b/langs/en-ca.json
@@ -133,10 +133,13 @@
 				"missing-id": "An ID must be provided",
 				"invalid-socket": "Invalid socket data received, this means a module or system bug is present.",
 				"unknown-socket-event": "An unknown socket event was received: {event}",
-				"malformed-socket-payload": "Socket event \"{event}\" received with malformed payload. Details: {details}"
+			},
+			"warn": {
+				"migration-in-progress": "Applying data migrations for version {version}. Please do NOT refresh the window while this warning is present."
 			},
 			"success": {
-				"saved-default-attributes": "Successfully saved default Actor attributes"
+				"saved-default-attributes": "Successfully saved default Actor attributes",
+				"migration-successful": "Data migrations for version {version} were successful."
 			}
 		}
 	}
diff --git a/module/documents/Actor.mjs b/module/documents/Actor.mjs
index 9969f7a..0c97cea 100644
--- a/module/documents/Actor.mjs
+++ b/module/documents/Actor.mjs
@@ -34,10 +34,14 @@ export class TAFActor extends Actor {
 		this.#sortedTypes = null;
 	};
 
-	static migrateData(data, ...args) {
+	static migrateData(data, options) {
+		if (options.partial) { return }
+		console.log(`Actor#migrateData`, foundry.utils.deepClone(data), options);
 		if (Object.keys(data.system?.attr ?? {}).length > 0) {
+			console.log(`attributes exist`)
 			setProperty(data, `flags.${__ID__}.convertAttributesIntoItems`, true);
 		};
+		return data;
 	};
 	// #endregion Lifecycle
 
diff --git a/module/migrations/utils.mjs b/module/migrations/utils.mjs
index 807e69a..6950cc2 100644
--- a/module/migrations/utils.mjs
+++ b/module/migrations/utils.mjs
@@ -23,10 +23,7 @@ export async function migrateCollection(
 	options = {}
 ) {
 	const toMigrate = collection
-		.filter(doc => {
-			console.log(`toMigrate.filter doc`, doc);
-			return doc.getFlag(__ID__, flag)
-		})
+		.filter(doc => doc.getFlag(__ID__, flag))
 		.map(doc => {
 			const update = convertor(doc) ?? {};
 			update[`_id`] = doc._id;
@@ -41,8 +38,20 @@ export async function migrateCollection(
 			return update;
 		})
 		.filter(data => !!data);
-	// update in increments of 100
-	// TODO: optionally return an array of DB operations for modifyBatch
+
+	if (!options.update) {
+		return [{
+			action: `update`,
+			broadcast: true,
+			documentName: collection.documentName,
+			updates: toMigrate,
+			noHook: true,
+			pack: options.pack,
+			parent: options.parent,
+		}];
+	};
+
+	// Modify in batches of 100
 	const batches = Math.ceil(toMigrate.length / 100);
 	for (let i = 0; i < batches; i++) {
 		const updateData = toMigrate.slice(i * 100, (i + 1) * 100);
@@ -65,9 +74,9 @@ export async function migrateCollection(
  * @param pack The CompendiumPack document
  * @returns {boolean} Whether or not the pack should be migrated
  */
-export function shouldMigrateCompendium(pack) {
+export function shouldMigrateCompendium(pack, types = [`Actor`, `Item`]) {
 	// We only care about actor and item migrations
-	if (!["Actor", "Item"].includes(pack.documentName)) return false;
+	if (!types.includes(pack.documentName)) return false;
 
 	// World compendiums should all be migrated, system ones should never by migrated
 	if (pack.metadata.packageType === "world") return true;
diff --git a/module/migrations/v3.0.0.mjs b/module/migrations/v3.0.0.mjs
index 9754b27..0aa7f35 100644
--- a/module/migrations/v3.0.0.mjs
+++ b/module/migrations/v3.0.0.mjs
@@ -3,9 +3,24 @@ import { migrateCollection, shouldMigrateCompendium } from "./utils.mjs";
 
 const flag = `convertAttributesIntoItems`;
 const operations = [];
+let compendiumOperations = [];
 
 export async function migrateTo3_0_0() {
 	Logger.debug(`Starting v3.0.0 data migration`);
+	const packsToMigrate = game.packs.filter(
+		(pack) => shouldMigrateCompendium(pack, [`Actor`]),
+	);
+	const intervalSize = 1 / (packsToMigrate.length + 1);
+
+	const warning = ui.notifications.warn(
+		"taf.notifs.warn.migration-in-progress",
+		{
+			format: { version: `v3.0.0` },
+			progress: true,
+			permanent: true,
+			console: false,
+		},
+	);
 
 	operations.push(
 		...await migrateCollection(
@@ -15,30 +30,41 @@ export async function migrateTo3_0_0() {
 			{ update: false, },
 		),
 	);
+	warning.update({ pct: warning.pct + intervalSize });
 
-	// for (const pack of game.packs) {
-	// 	if (
-	// 		pack.metadata.type !== "Actor"
-	// 		|| !shouldMigrateCompendium(pack)
-	// 	) {
-	// 		continue;
-	// 	};
+	for (const pack of packsToMigrate) {
+		await pack.getDocuments();
 
-	// 	await pack.getDocuments();
+		const wasLocked = pack.config.locked;
+		if (wasLocked) pack.configure({ locked: false });
 
-	// 	// TODO: unlock compendium if required then re-lock after finishing
-	// 	await migrateCollection(
-	// 		pack,
-	// 		flag,
-	// 		handleMigratingActor,
-	// 		{ pack },
-	// 	);
-	// };
+		compendiumOperations.push(
+			...await migrateCollection(
+				pack,
+				flag,
+				handleMigratingActor,
+				{ pack, update: false, },
+			),
+		);
+
+		// foundry.documents.modifyBatch(compendiumOperations);
+		console.log(`compendiumOperations`, compendiumOperations);
+
+		if (wasLocked) await pack.configure({ locked: true });
+
+		compendiumOperations = [];
+		warning.update({ pct: warning.pct + intervalSize });
+	};
+
+	// TODO: re-lock packs here?
+
+	warning.update({ pct: 1 });
 
 	// TODO: create the item documents (batch them if possible)
 	Logger.debug(`Finished v3.0.0 migration, resulting operations:`);
 	console.log(operations);
 	// Use: foundry.documents.modifyBatch
+	// await foundry.documents.modifyBatch(operations);
 };
 
 function handleMigratingActor(actor) {
@@ -48,16 +74,27 @@ function handleMigratingActor(actor) {
 		action: `create`,
 		documentName: `Item`,
 		parent: actor,
+		noHook: true,
 		data: [],
 	};
 
-	const attrs = actor.system.attr;
+	const attrs = actor.system?.attr ?? {};
 	for (const [ key, attr ] of Object.entries(attrs)) {
 		operation.data.push(convertToItem(key, attr));
 	};
-	operations.push(operation);
 
-	return null;
+	// No items to create, don't queue the operation
+	if (operation.data.length > 0) {
+		if (actor.inCompendium) {
+			compendiumOperations.push(operation);
+		} else {
+			operations.push(operation);
+		};
+	};
+
+	return {
+		"system.attr": _del,
+	};
 };
 
 function convertToItem(key, attr) {
@@ -68,6 +105,7 @@ function convertToItem(key, attr) {
 			key,
 			value: attr.value,
 			max: attr.isRange ? attr.max : null,
+			aboveTheFold: true,
 		},
 	};
 };