Child of the Volcano

Descend is the mechanic's payoff written at its most casual: a body that grows only on the turns you feed your own graveyard, once per end step, no more. The condition is deliberately loose (any permanent card hitting the yard from anywhere counts, not just creatures, not just yours dying in combat), which is what keeps the trigger reachable in a fair deck without demanding a sacrifice engine. A fetchland cracking, a self-mill effect, an artifact or enchantment dying, or a plain creature trade all switch it on; note the card requirement, though, which means spending a Treasure or any other token does nothing, since a token is not a card put into the graveyard. What the growth costs is timing: the counter lands at your end step, so the 3/3 that attacked was still a 3/3 when it hit, and it only pulls ahead after the fact. Trample is the connective tissue that makes those accrued counters matter, turning a slow snowball into pressure that ignores chump blockers. The upshot is a creature that rewards a deck already spilling cards into the graveyard as a byproduct of doing other things, rather than one that asks you to build around the trigger. It is a common-rarity anchor for that kind of self-fueling red midrange: unremarkable when your graveyard sits empty, a genuine threat the moment your other spells start filling it, and honest about which of those two games you are actually playing.