Chaos aims at no one

The client always offered CHAOS from the hint bar without a target,
and the engine refused it: "attack spells target a player". Not this
one — cast bare, it sweeps every other living wizard into the pile,
each offered their FULL SHIELD sit-out in turn order from the caster.
No stack forms; full shields only ever excluded a player from the
storm, so the queue is the whole defense. The older player-targeted
form stays accepted, so stored games replay unchanged. The scramble
joins the chronicle's notable events — a turn that redeals every hand
earns its eye.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RCWSTnb1KYTPyL4GmhGnF

packages/engine/src/game.ts

@@ -4933,6 +4933,28 @@ function doCast(prev: GameState, cmd: Extract<Command, { type: "cast" }>): Comma
       }
       return { ok: true, state, events: events2 };
     }
+    // CHAOS aims at no one: cast bare, it sweeps every other living
+    // wizard into the pile, each offered their FULL SHIELD sit-out in
+    // turn order. (Full shields only exclude; nothing in the set cancels
+    // a zero-point storm, so the queue is the whole defense.) The older
+    // player-targeted form is still accepted below, so stored games
+    // replay unchanged.
+    if (inHand.cardId === "chaos" && (!cmd.target || cmd.target.kind !== "player")) {
+      consumeCast(state, caster, inHand, mods, false);
+      if (state.turn.attackUsed) state.turn.secondAttackUsed = true;
+      state.turn.attackUsed = true;
+      state.lastSpellUsed[caster.id] = inHand.cardId;
+      const events: GameEvent[] = [{
+        type: "spellCast", caster: caster.id, card: inHand, cardId: inHand.cardId,
+        numberCards: mods.numbers, numberValue: mods.magnitude.numberValue,
+        from: caster.position, target: null, targetCell: null,
+      }];
+      const queue = turnOrderFrom(state, caster.id).filter((id) =>
+        id !== caster.id && state.players.find((p) => p.id === id)!.alive);
+      state.chaosPending = { casterId: caster.id, excluded: [], queue };
+      finishChaosIfReady(state, events);
+      return { ok: true, state, events };
+    }
     if (!cmd.target || cmd.target.kind !== "player") return err("attack spells target a player");
     if (cmd.target.playerId === caster.id) return err("you cannot attack yourself");
     const target = state.players.find((p) => p.id === (cmd.target as { playerId: PlayerId }).playerId);