diff --git a/worlds/grinch/Client.py b/worlds/grinch/Client.py
index c7a53abf..eea69397 100644
--- a/worlds/grinch/Client.py
+++ b/worlds/grinch/Client.py
@@ -193,6 +193,15 @@ class GrinchClient(BizHawkClient):
     async def constant_address_update(self, ctx: "BizHawkClientContext"):
         list_recv_itemids: list[int] = [netItem.item for netItem in ctx.items_received]
         items_to_check: dict[str, GrinchItemData] = {**SLEIGH_PARTS_TABLE, **MISSION_ITEMS_TABLE, **GADGETS_TABLE, **KEYS_TABLE}
+        heart_count = len(list(item_id for item_id in list_recv_itemids if item_id == 42570))
+        heart_item_data = ALL_ITEMS_TABLE["Heart of Stone"]
+        await self.update_and_validate_address(ctx, heart_item_data.update_ram_addr[0].ram_address, min(heart_count, 4), 1)
+
+        has_sleigh_key = any(list(item_id for item_id in list_recv_itemids if item_id == 42479))
+        if not has_sleigh_key:
+            sleigh_key_item_data = ALL_ITEMS_TABLE["Sleigh Room Key"]
+            # TODO Game sets value to 3 at some point. If this breaks at some point, go back into this.
+            await self.update_and_validate_address(ctx, sleigh_key_item_data.update_ram_addr[0].ram_address, 0, 1)
 
         for (item_name, item_data) in items_to_check.items():
             # If item is an event or already been received, ignore.