Become Immense

The printed cost says six mana, but no one ever pays it. Delve turns the graveyard into mana, and a single-creature deck running fetchlands, cantrips, and cheap pump can empty enough cards to cast this for as early as the second or third turn. That is the entire pitch: a +6/+6 swing that warps the math of any board where one unblocked creature is already on the table. The design lives or dies on the cost of the rest of the deck, not on its own line. In a vacuum a six-mana instant that grants +6/+6 is filler; it was deliberately built to be paid for by the resources an aggressive creature deck already burns through. The tension is that delve fuel is finite and shared. Every card you exile here is a card not flashing back, not threatening from the yard, not feeding a second copy later in the turn. It rewards a deck that wants its graveyard spent now rather than hoarded, and it is punished hard by graveyard hate that strips the fuel before you can convert it: a single exile-the-yard effect can push this back toward its full six-mana price and take it off the table for the turn it was meant to win. As a combat finisher it does what one-mana-effective pump spells do, turning a lone attacker into lethal, but delve gives it a ceiling those lack: when the graveyard is stocked, this stops being a trick and becomes the kill.