diff --git a/packages/web/src/net.svelte.ts b/packages/web/src/net.svelte.ts
index f4ea00f..ee9f13e 100644
--- a/packages/web/src/net.svelte.ts
+++ b/packages/web/src/net.svelte.ts
@@ -1,7 +1,7 @@
 // Websocket client + reactive session state (Svelte 5 runes).
 
 import type { Command, GameEvent, GameView, Side } from "@wizwar/engine";
-import { cardDef } from "@wizwar/engine";
+import { cardDef, isPermanentDuration } from "@wizwar/engine";
 import { receiptFor } from "./receipt";
 
 /** The same server over plain HTTP, for the one door a socket cannot carry: a picture. */
@@ -99,7 +99,9 @@ export function humanize(e: GameEvent): string | null {
     case "squareContentDestroyed": return e.kind === "ooze" ? `🔥 The ooze burns away under ${e.attacker}'s fire!` : `🌿 The ${e.kind} is torn apart by ${e.attacker}'s attack!`;
     case "slowDeathWindow": return `Slow Death bites ${e.player} for ${e.points} — a counter hovers over the wound…`;
     case "slowDeathCountered": return `${e.player}'s ${cardDef(e.cardId).name} blunts the rot — ${e.remaining} point${e.remaining === 1 ? "" : "s"} still coming.`;
-    case "spellSustained": return `${spellName(e.cardId)} settles over ${e.target} (${e.turns} turn${e.turns === 1 ? "" : "s"}).`;
+    case "spellSustained": return isPermanentDuration(e.turns)
+      ? `${spellName(e.cardId)} settles over ${e.target} for good.`
+      : `${spellName(e.cardId)} settles over ${e.target} (${e.turns} turn${e.turns === 1 ? "" : "s"}).`;
     case "spellExpired": return `${spellName(e.cardId)} wears off ${e.target}.`;
     case "teleported": return e.by === e.player
       ? `${e.player} teleports across the maze!`
diff --git a/packages/web/src/receipt.ts b/packages/web/src/receipt.ts
index 8c5ed42..a808a78 100644
--- a/packages/web/src/receipt.ts
+++ b/packages/web/src/receipt.ts
@@ -3,7 +3,7 @@
 // engine's own events, so it explains what happened rather than what the
 // cards promise.
 
-import { cardDef, type GameEvent } from "@wizwar/engine";
+import { cardDef, isPermanentDuration, type GameEvent } from "@wizwar/engine";
 
 export interface Receipt {
   title: string;
@@ -75,7 +75,8 @@ export function receiptFor(batch: readonly GameEvent[], e: GameEvent): Receipt |
       : e.fullyStopped ? "nothing lands"
       : healed && healed.type === "lifeGained" ? `${healed.amount} heals ${e.defender} instead`
       : e.damageDealt > 0 ? `${e.damageDealt} lands on ${e.defender}`
-      : tookHold && tookHold.type === "spellSustained" ? `${card} takes hold of ${e.defender} for ${tookHold.turns} turn${tookHold.turns === 1 ? "" : "s"}`
+      : tookHold && tookHold.type === "spellSustained"
+        ? (isPermanentDuration(tookHold.turns) ? `${card} takes hold of ${e.defender} for good` : `${card} takes hold of ${e.defender} for ${tookHold.turns} turn${tookHold.turns === 1 ? "" : "s"}`)
       : "nothing to land",
     );
     lines.push(parts.join(" → "));