A cosmetic currency used to apply Star Levels to maxed cards (Levels 7, 10 and 13), giving them a golden shine. Purely cosmetic — no stat effect.
Applying Star Levels historically required a minimum King Level. Unchanged through the 2026 Collection Levels update.
No — Star Levels are a golden coat of paint. No hit points, no damage, nothing. They exist so maxed players still have something to earn, which is also why Star Points only start flowing once cards hit max level.
Whatever you see most: your win condition and your most-played cycle cards. Since the effect is purely visual, the only 'value' is how often the shine is on screen.