merge cards mtg How mutate work Fuse in MTG: Rules, History,

Even attached to a weak body, this is a great combo piece that can do silly things, especially if you can give it haste

(2025-06-06) In the rare case where enough -1/-1 counters are put on Aerith Gainsborough at the same time to make its toughness 0 or less, the number of +1/+1 counters on it before it got those -1/-1 counters will be used to determine the value of X in Aerith Gainsborough's third ability

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

You control target opponent during their next combat phase

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

Have any suggestions or decklists you want to share