Soul of Ravnica

The body is the unhedged part of this card: a 6/6 flyer is a real clock that demands an answer regardless of what the activated ability ever does. That separates it from most card-advantage engines, which sit on fragile bodies and beg to be ignored. The draw ability is built around a counting condition that quietly punishes mono-blue: in a deck that plays only one color among its permanents, the seven-mana activation cantrips for a single card, a miserable rate. The reward scales with breadth, not with raw card count, so the engine is really asking you to splash, to run multicolor permanents, to widen the board's color spread before you ever fire it. The graveyard line is the insurance policy: it cannot be answered by killing the creature in response, because the card draws once more from exile after it dies, which means a single removal spell never fully closes the door. That is the structural cleverness here, the body forces interaction, and the interaction is partially refunded. It belongs to a cycle of Avatar "Souls," each a large body stapled to a color-themed activated ability usable from the battlefield and again from the graveyard, designed as a top-end finisher that does not become a dead draw once it has been dealt with. Among them this is the value engine, the one whose ceiling depends entirely on how greedy a manabase you are willing to build behind it.