Mammoth Bellow

Cast from hand, this is a five-mana sorcery that makes a single 5/5, a rate green has been shipping on vanilla beaters for as long as it has been printing them. The reason to read it twice sits at the bottom: harmonize lets you recast the card from your graveyard, and the recast lets you tap a creature you already control to shave off the cost, where X is that creature's power. Tap your first Elephant and the buyback for the second one costs almost nothing. The natural sequence is to hold the token back, then spend its 5 power the moment the sorcery lands in the yard: the token taps to pay, stays on the board, and untaps next turn ready to attack or block. What keeps that from spiraling is the exile clause on harmonize. The spell leaves the graveyard the instant you cast it that way, so the recursion is exactly one deep: you get a second body, then the card is gone. That single-use ceiling reframes the whole design. Harmonize here is not an engine but a deferred second payment, a way to convert a big creature's untapped power into a discount on one more 5/5 rather than a loop that prints tokens forever. The trick is spending activity you already have on the board, not manufacturing it from nothing.