Minthara, Merciless Soul (Showcase) (432) [Commander Legends: Battle for Baldur's Gate] [Showcase]

Minthara has ward {X}, where X is the number of experience counters you have. At the beginning of your end step, if a permanent you controlled left the battlefield this turn, you get an experience counter. Creatures you control get +1/+0 for each experience counter you have.