diff --git a/src/samples/slay-the-spire-like/system/grid-inventory/transform.ts b/src/samples/slay-the-spire-like/system/grid-inventory/transform.ts
index c1e0cb1..720bf03 100644
--- a/src/samples/slay-the-spire-like/system/grid-inventory/transform.ts
+++ b/src/samples/slay-the-spire-like/system/grid-inventory/transform.ts
@@ -1,3 +1,4 @@
+import { EffectData } from "../types";
 import type { ParsedShape } from "../utils/parse-shape";
 import type { Transform2D } from "../utils/shape-collision";
 import {
@@ -10,6 +11,7 @@ import {
 } from "../utils/shape-collision";
 import type {
   CellKey,
+  GameItemMeta,
   GridInventory,
   InventoryItem,
   MutationResult,
@@ -255,3 +257,38 @@ export function getAdjacentItems<TMeta>(
 
   return adjacent;
 }
+
+// export type EffectTable = Record<string, { data: EffectData; stacks: number }>;
+export function getItemEffects(
+  inv: GridInventory<GameItemMeta>,
+  lookup: EffectData[],
+) {
+  const effects = {} as Record<
+    string,
+    Record<string, { data: EffectData; stacks: number }>
+  >;
+
+  for (const item of inv.items.values()) {
+    if (!item.meta) continue;
+    const { startEffects } = item.meta;
+    if (!startEffects) continue;
+
+    const table = (effects[item.id] = {} as Record<
+      string,
+      {
+        data: EffectData;
+        stacks: number;
+      }
+    >);
+    for (const [id, stacks] of Object.entries(startEffects)) {
+      const data = lookup.find((row) => row.id === id);
+      if (!data) continue;
+      table[id] = {
+        data,
+        stacks,
+      };
+    }
+  }
+
+  return effects;
+}