Bumi, Unleashed

The extra combat phase is where this card's math gets strange, and it is not a double strike: it is a full additional combat step, restricted so that only land creatures can attack in it. That restriction is what turns Earthbend from a value ability into the whole plan. The sequence is self-reinforcing: connect once, untap every land, and any land you have animated (whether from the entry's earthbend 4 or another source) is free to attack again into an opponent who spent blockers on the first pass. The untap clause carries the load, because it refunds the mana you spent making those lands into attackers, so the second combat is a resource-neutral swing rather than a resource sink. Trample on a 5/4 body keeps the initial hit from stalling on a chump, which matters when the entire engine keys off combat damage actually reaching the player. What makes the design coherent is that every clause points at the same axis: a Gruul deck that treats its own manabase as its army, animating lands and then extracting a second attack step from them once the first connects. It is built to reward a battlefield full of creature-lands rather than a wide board of ordinary attackers, rewriting the combat step around a resource almost every deck already runs.