docs(design): define tyrant game stories

2026-08-14 22:08:35 -04:00
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+---
+type: User Story
+title: "US-005: Use Assassin abilities"
+description: Give the Assassin timed stealth and a risky burst-mobility ability.
+status: backlog
+---
+
+# US-005: Use Assassin abilities
+
+As the **Assassin**, I want stealth and burst mobility so that I can ambush opponents while accepting a combat penalty afterward.
+
+## Acceptance criteria
+
+- [ ] The Assassin can activate ten minutes of invisibility once per rolling hour using the named Assassin ability item.
+- [ ] Invisibility displays no potion particles.
+- [ ] Activation while in the same world and within the configured Tyrant range grants twenty minutes instead.
+- [ ] Proximity is evaluated when the ability is activated and does not alter the active duration afterward.
+- [ ] The Assassin can double-jump once every 60 seconds without requiring an item.
+- [ ] A successful double-jump grants Speed for 15 seconds and Weakness III for 20 seconds.
+- [ ] Grounding and supported movement reset jump availability only after the 60-second cooldown has elapsed.
+- [ ] Ability cooldowns use unpaused elapsed time and survive death, logout, and restart.
+- [ ] The player can inspect remaining cooldowns and receives clear feedback when an activation is unavailable.
+
+## Related
+
+- [Use class ability items](us-014-use-class-ability-items.md)
+- [Configure and persist game state](us-012-configure-and-persist-state.md)