merge cards mtg How mutate work An Early look: The Brothers'

You control target opponent during their next combat phase

The controller wants to defeat the Siege, because once the Siege's last defense counter is removed, it is exiled, and its controller gets to play its reverse face for free

This faerie builds your air force over time, trading 1 life on upkeep to create a 1/1 flying faerie token

Kaya's last ability checks to see whether the permanent was an Aura when it last existed on the battlefield, not whether it is an Aura card in exile

Wizards has been good about not throwing any huge curveballs here since the 30% hurdle in Commander Legends, and it makes these calculations a lot easier