Predatory Wurm

A green beatstick with a planeswalker fetish. The base body is a fair 4/4 with vigilance, the kind of unremarkable ground presence green has printed forever; strip away the conditional and there is nothing here to build around. Control a Garruk and it swells to a 6/6 that can guard while it attacks, a genuinely large threat at four mana. The design gates a creature's ceiling behind a single named planeswalker family: a build-around switch that fires only in the specific Garruk decks it was made for and stays dark for everyone else. That narrowness explains the steepness of the buff, a full +2/+2 rather than the smaller unconditional bonus green usually settles for, because there is no incidental way to turn it on. Vigilance is what keeps the payoff coherent: a Garruk tends to want creatures both defending it on the ground and pushing damage, and a body that does both at once serves that plan without forcing a choice between offense and defense. Outside a Garruk shell it reverts to its plain baseline, and the card is honest about the trade rather than hedging.