Rev 21: collapsing walls crush anyone — monsters included

DESTROY WALL's "anyone in either square next to the wall takes 4
points" swept only wizards; a troll leaned on the falling masonry
untouched. The expansion sheet is explicit — "if a card specifies
'Opponent' or 'Anyone' as a target, this includes Monsters" — so the
collapse now crushes creatures in both squares, at the rim breach's
far side too. Earlier ledgers keep their charmed monsters.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/engine/test/creatures.test.ts

@@ -640,3 +640,46 @@ describe("a mid-round democratic monster claws on the next turn (rules rev 18)",
     expect(r.state.stack?.creatureId ?? null).toBe(fresh.id);
   });
 });
+
+describe("collapsing walls crush monsters too (rules rev 21)", () => {
+  function wallRig(deckRev: number) {
+    let { state } = createGame({ playerIds: ["a", "b"], seed: 42, sets: ["basic", "expansion1"], deckRev });
+    state = toRound2(state);
+    const view = boardView(state);
+    for (const [key, edge] of Object.entries(view.edges)) {
+      if (edge !== "wall") continue;
+      const [kind, coords] = key.split(":") as [string, string];
+      const [x, y] = coords.split(",").map(Number) as [number, number];
+      const side = kind === "V" ? ("E" as Side) : ("S" as Side);
+      const other = { x: x + (side === "E" ? 1 : 0), y: y + (side === "S" ? 1 : 0) };
+      if (!view.cells[cellKey(other)]) continue;
+      const caster = activePlayer(state);
+      caster.position = { x, y };
+      state.creatures.push({
+        id: "tr1", kind: "troll", controllerId: caster.id,
+        position: { ...other }, damage: 0, maxDamage: 6, movesPerTurn: 3,
+        movementUsed: 0, attackUsed: false, justCreated: false,
+        wallPassesPerTurn: 0, wallPassUsed: 0, scorchedThisTurn: [],
+      });
+      const dw = giveCard(state, caster.id, "destroy-wall");
+      const r = applyCommand(state, caster.id, {
+        type: "cast", instanceId: dw.instanceId, target: { kind: "edge", cell: { x, y }, side },
+      });
+      if (!r.ok) throw new Error(r.error);
+      return r.state;
+    }
+    throw new Error("setup: no interior wall found");
+  }
+
+  it("rev 21: the adjacent troll takes the four points", () => {
+    const state = wallRig(21);
+    const troll = state.creatures.find((c) => c.id === "tr1");
+    // Four points on a six-point troll: hurt but standing (or regenerating).
+    expect(troll?.damage).toBe(4);
+  });
+
+  it("earlier revisions leave the troll dusty but unharmed", () => {
+    const state = wallRig(20);
+    expect(state.creatures.find((c) => c.id === "tr1")!.damage).toBe(0);
+  });
+});