Gurmag Drowner

Exploit pays you for a sacrifice you were already willing to make, and this is the version that turns the resource you spend into card selection. The trick is that the ability triggers on the act of exploiting, not on a creature dying, so the value is gated behind actually feeding the snake something: an expendable token, a one-drop that has outlived its purpose, the dying half of another exploit chain. In return you dig four deep and keep the best one, with the rest stocking a graveyard for whatever cares about it. That is the design conversation exploit was built to have: it asks you to weigh a body against a tempo gain, and it rewards decks structured to make the sacrifice cheap rather than painful. The 2/4 body does its own quiet work, blocking well enough that you can run this on the front of a slower deck and treat the dig as a bonus stapled to a wall. The instinct to read exploit as pure aristocrats fodder undersells it here; the reward is filtration and graveyard fuel, which points at value engines and self-mill as readily as it points at sacrifice payoffs. Crack a creature you no longer need, see four, take the answer you want, and bury three more for later.