Oculus

A blocker that pays you on the way out. The trade math here is straightforward: it stops one attacker, and when it dies it replaces itself, so any creature your opponent sends into it has to be worth more than the chump-block plus a card. That puts a tax on aggression without demanding a sacrifice outlet or a death payoff to build around; the cantrip is baked in. The cleaner expression of this idea is Wall of Omens, which lands the draw immediately and asks nothing of combat, but the die-trigger version has its own logic: it wants to fight, to soak up damage and removal and pitch itself, where the wall just sits. As fodder it is honest, a two-mana body that refunds its card when it dies. The friction is that the draw is contingent on death, so it does nothing while alive beyond holding the ground in front of it, and it only ever replaces itself once. Nothing flashy, but the structural job (a small body that costs the opponent a card to clear) is one that quietly props up grindy blue decks that would rather not spend real cards holding back the early turns.