Vault Plunderer

The trade is old: pay a life, draw a card, and black has been signing that deal since Night's Whisper made two-for-one refill look free. What this staples onto the loan is a body worth attacking with, a 3/1 that arrives with its card already in hand. The fragile toughness is the tell about who this was built for: a creature that has already replaced itself asks nothing of you when you feed it to a sacrifice engine, because trading it away costs nothing you had not already banked. The enters trigger reads as symmetrical (target player, not you), which opens a line a straight cantrip does not: point it at an opponent so the draw and life loss land on them instead of you, though that mode is mostly a rounding error against the ordinary self-refill. The real reason the glass body is a feature rather than a flaw is the front-loading. Everything the card offers happens the instant it lands, so a toughness of one never touches whether you got your value; the 3/1 is a warm body attached to a completed transaction, free to attack into unfavorable blocks, chump when needed, or die to an outlet. A cantrip you can also throw at the red zone or sell to your own aristocrats board, with the draw already collected before the body ever matters.