feat(gear): add final unbreakable Elytra reward

design/concepts/role-and-class-model.md

@@ -23,9 +23,11 @@ The Tyrant starts each reign at level zero with one starting unlock choice. Pers
 - Permanent Resistance
 - Permanent Strength
 
-## Legacy armor
+## Legacy rewards
 
-After purchasing all six standard reign unlocks, the Tyrant may spend later choices on one each of four legacy armor slots. These named Netherite rewards are tracked only to prevent duplicate claims during the current reign; the resulting armor remains ordinary transferable equipment and survives role succession in player inventories.
+After purchasing all six standard reign unlocks, the Tyrant may spend one choice each on four armor pieces and five tools/weapons independently, in any order. Once all nine regular rewards have been claimed in the current reign, one additional choice buys a final unbreakable Elytra once per reign. Earlier items need not still be possessed. Elytra is excluded from the explicit prerequisite set.
+
+All ten rewards remain ordinary transferable equipment after succession; only claim eligibility resets. The Elytra carries Minecraft's Unbreakable flag without redundant enchantments, a gold Tyrant/player name, and gray collection lore. Loss or destruction does not permit replacement.
 
 ## Proximity
 
@@ -37,6 +39,8 @@ Vigilante Follower scaling is capped by default at Strength V and Resistance IV,
 
 ## Related stories
 
+- [Complete the legacy collection with Elytra](../user-stories/us-023-complete-legacy-collection-with-elytra.md)
+
 - [Progress and purchase Tyrant unlocks](../user-stories/us-003-progress-and-purchase-unlocks.md)
 - [Assign unlocked classes](../user-stories/us-004-assign-unlocked-classes.md)
 - [Support the Vigilante and Followers](../user-stories/us-008-support-vigilante-and-followers.md)