diff --git a/src/actionHandlers.ts b/src/actionHandlers.ts
index a47f326..ee78326 100644
--- a/src/actionHandlers.ts
+++ b/src/actionHandlers.ts
@@ -37,6 +37,7 @@ import type {
 	ActionModdedRequest,
 	ActionHandyMPExtensionEnable,
 	ActionHandyMPExtensionDisable,
+    ActionDataSyncRequest,
 } from "./actions.js";
 import { generateSeed } from "./utils.js";
 import {
@@ -931,6 +932,19 @@ const streamLogLinesAction = (
 	});
 };
 
+const dataSyncAction = (
+    { timer }: ActionHandlerArgs<ActionDataSyncRequest>,
+    client: Client,
+ ) => {
+	const [lobby, enemy] = getEnemy(client);
+    if (!lobby || !enemy) return
+
+    enemy.sendAction({
+        action: "dataSync",
+        timer: Number.isNaN(timer) ? undefined : Number(timer)
+    })
+}
+
 export const actionHandlers = {
 	username: usernameAction,
 	createLobby: createLobbyAction,
@@ -985,6 +999,7 @@ export const actionHandlers = {
 	handyMPExtensionEnable: handyMPExtensionEnable,
 	handyMPExtensionDisable: handyMPExtensionDisable,
     failPvPTimer: failPvPTimerAction,
+    dataSync: dataSyncAction,
 } satisfies Partial<ActionHandlers>;
 
 /** Server-internal handler for connection drops (not a client action) */
diff --git a/src/actions.ts b/src/actions.ts
index e78e18c..466a69b 100644
--- a/src/actions.ts
+++ b/src/actions.ts
@@ -62,6 +62,7 @@ export type ActionGetNemesisStatsRequest = { action: 'endGameStatsRequested' }
 export type ActionReceiveNemesisStatsRequest = { action: 'nemesisEndGameStats', reroll_count: string, reroll_cost_total:string, vouchers:string }
 export type ActionStartAnteTimer = { action: 'startAnteTimer', time: number, isPvP?: boolean }
 export type ActionPauseAnteTimer = { action: 'pauseAnteTimer', time: number }
+export type ActionDataSyncResponse = { action: "dataSync", timer?: number }
 // Handy Actions (Server to Client)
 export type ActionHandyMPExtensionLobbyEnabled = { action: 'handyMPExtensionLobbyEnabled', enabled: boolean }
 // TCG Actions (Server to Client)
@@ -115,6 +116,7 @@ export type ActionServerToClient =
 	| ActionTcgPlayerStatus
 	| ActionTcgStartTurn
 	| ActionModded
+    | ActionDataSyncResponse
     | ActionHandyMPExtensionLobbyEnabled
 // Client to Server
 export type ActionUsername = { action: 'username'; username: string; modHash: string }
@@ -175,6 +177,7 @@ export type ActionTcgEndTurn = { action: 'tcgEndTurn', [key: string]: unknown }
 export type ActionModdedRequest = { action: 'moddedAction', modId: string, modAction: string, target?: 'nemesis' | 'all', [key: string]: unknown }
 // Handy Actions (Client to Server)
 export type ActionRejoinLobby = { action: 'rejoinLobby'; code: string; reconnectToken: string }
+export type ActionDataSyncRequest = { action: "dataSync", timer?: number }
 export type ActionHandyMPExtensionEnable = { action: 'handyMPExtensionEnable', [key: string]: unknown }
 export type ActionHandyMPExtensionDisable = { action: 'handyMPExtensionDisable', [key: string]: unknown }
 export type ActionClientToServer =
@@ -230,6 +233,7 @@ export type ActionClientToServer =
 	| ActionTcgEndTurn
 	| ActionModdedRequest
 	| ActionRejoinLobby
+    | ActionDataSyncRequest
     | ActionHandyMPExtensionEnable
     | ActionHandyMPExtensionDisable
 // Utility actions
diff --git a/src/main.ts b/src/main.ts
index feee838..093ce76 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -40,6 +40,7 @@ import type {
 	ActionRejoinLobby,
     ActionHandyMPExtensionEnable,
     ActionHandyMPExtensionDisable,
+    ActionDataSyncRequest,
 } from './actions.js'
 import { InsaneInt } from './InsaneInt.js'
 import { ABUSE_CONFIG, ConnectionMeter } from './abuse.js'
@@ -507,6 +508,12 @@ const server = createServer((socket) => {
 							client,
 						)
 						break
+                    case 'dataSync':
+                        actionHandlers.dataSync(
+                            actionArgs as ActionHandlerArgs<ActionDataSyncRequest>,
+                            client,
+                        )
+                        break
 					case 'handyMPExtensionEnable':
 						actionHandlers.handyMPExtensionEnable(
 							actionArgs as ActionHandlerArgs<ActionHandyMPExtensionEnable>,