Check the latest information for Set 4: Fates!
TFT 10.24 patch data has been applied.
At the start of combat, a number of Moonlight Champions star up once until combat ends. (Prioritizes the lowest star-level champions. If tied, champions with the most items are chosen.)
3 1 Champion
5 2 Champions
Innate: At the start of combat, Assassins leap to the enemy backline. Assassins gain bonus Critical Strike Damage and Chance, and their spells can critically strike.
2 +30% Critical Strike Damage & +10% Critical Strike Chance
4 +60% Critical Strike Damage & +25% Critical Strike Chance
6 +90% Critical Strike Damage & +40% Critical Strike Chance