Amplify announces itself

Room 9BBV's "impossible" 14-point powerthrust was an archmage playing
correctly: 2 + 5, AMPLIFIED. The engine's math was honest and its
narration was not — neither the log line nor the attack modal
mentioned the amplify, so a legal kill read as a bug. The spellCast
event now carries its amplify count, the chronicle says "casts
Powerthrust with a 5, AMPLIFIED, at Kestrel", and the modal's power
line shows "powered by a 5 — AMPLIFIED ×2" while there is still time
to respect it.

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

packages/engine/src/game.ts

@@ -483,7 +483,8 @@ export type GameEvent =
   | { type: "moved"; player: PlayerId; from: Cell; to: Cell; direction: Side; via: "step" | "warp" | "passWall" }
   | { type: "numberPlayedForMovement"; player: PlayerId; card: CardInstance; value: number; newAllowance: number }
   | { type: "punched"; attacker: PlayerId; target: PlayerId; at: Cell }
-  | { type: "spellCast"; caster: PlayerId; card: CardInstance; cardId: string; numberCards: CardInstance[]; numberValue: number | null; from: Cell; target: PlayerId | null; targetCell: Cell | null }
+  | { type: "spellCast"; caster: PlayerId; card: CardInstance; cardId: string; numberCards: CardInstance[]; numberValue: number | null; from: Cell; target: PlayerId | null; targetCell: Cell | null;
+      /** AMPLIFY cards attached (each doubles). */ amplifies?: number }
   | { type: "counteractionPlayed"; player: PlayerId; card: CardInstance; cardId: string; against: string }
   | { type: "counterNullified"; player: PlayerId; card: CardInstance; by: CardInstance }
   | { type: "attackAbsorbedIntoHand"; player: PlayerId; attackCard: CardInstance }
@@ -4496,6 +4497,7 @@ function doCast(prev: GameState, cmd: Extract<Command, { type: "cast" }>): Comma
       cardId: inHand.cardId,
       numberCards: mods.numbers,
       numberValue: mods.magnitude.numberValue,
+      amplifies: mods.amplifies.length,
       from: caster.position,
       target: target.id,
       targetCell: target.position,

packages/web/src/App.svelte

@@ -1091,8 +1091,11 @@
           {:else}
             <div class="attack-card"><Card card={view.stack.attackCard} /></div>
           {/if}
-          {#if view.stack.numberValue != null}
-            <div class="attack-power">powered by a {view.stack.numberValue}</div>
+          {#if view.stack.numberValue != null || view.stack.amplifyFactor > 1}
+            <div class="attack-power">
+              {view.stack.numberValue != null ? `powered by a ${view.stack.numberValue}` : ""}
+              {view.stack.amplifyFactor > 1 ? ` — AMPLIFIED ×${view.stack.amplifyFactor}` : ""}
+            </div>
           {/if}
         {:else if view.stack.defenderId === view.you}
           <div class="attack-fist">👊 a bare-knuckled punch</div>

packages/web/src/net.svelte.ts

@@ -39,8 +39,9 @@ export function humanize(e: GameEvent): string | null {
     case "punched": return `${e.attacker} punches ${e.target}!`;
     case "spellCast": {
       const num = e.numberValue ? ` with a ${e.numberValue}` : "";
+      const amp = e.amplifies ? `, AMPLIFIED${e.amplifies > 1 ? ` ×${2 ** e.amplifies}` : ""},` : "";
       const at = e.target ? ` at ${e.target}` : "";
-      return `${e.caster} casts ${cardDef(e.cardId).name}${num}${at}.`;
+      return `${e.caster} casts ${cardDef(e.cardId).name}${num}${amp}${at}.`;
     }
     case "counteractionPlayed": return `${e.player} counters with ${cardDef(e.cardId).name}!`;
     case "counterNullified": return `${cardDef(e.card.cardId).name} is nullified by Anti-Anti!`;