In the high caves of the Qal Sisma mountains, young hunters quest to hear the echoes of their fierce ancestors.

Heir of the Wilds

Deathtouch
Ferocious — Whenever Heir of the Wilds attacks, if you control a creature with power 4 or greater, Heir of the Wilds gets +1/+1 until end of turn.

Magic Online Promos

Khans of Tarkir

Khans of Tarkir Promos

Heir of the Wilds has a triggered ferocious ability with an intervening “if” clause. That ability will check if you control a creature with power 4 or greater whenever Heir of the Wilds attacks. If you don’t at that time, the ability won’t trigger at all. If it triggers, the ability will also check if you control a creature with power 4 or greater as it resolves. If you don’t at that time, the ability won’t do anything. Note that the creature with power 4 or greater you control as the ability triggers doesn’t necessarily have to be the same one you control as the ability resolves.