Stonecloaker

Flash is the keyword doing the real work here. The body, a 3/2 flyer for three, is fine but unremarkable; what keeps the card relevant is the instant-speed window that lets all three functions land on an opponent's turn. The two enter triggers fire together: one returns a creature you control to hand, the other exiles a card from any graveyard. The bounce reads as a drawback until you point it at one of your own creatures with an enter trigger, at which point this becomes a self-flickering loop you can hold up at instant speed. The crucial detail is that the bounce does not target, so it can return Stonecloaker itself: with no other creatures out, it simply bounces back to your hand, leaving you a repeatable graveyard-exile effect you can recast each turn. That self-returning clause is what separates this from most graveyard hate, which either sits at sorcery speed or commits a permanent that does nothing else. Here you can ambush an attacker, bounce a creature out from under a removal spell already on the stack, and snipe a reanimation or recursion target, all in the same flash window, then reset the whole package next turn. The tension between disruption you cast on their turn and the tempo you spend bouncing your own board is the entire reason a modest 3/2 has stayed in the conversation across so many years.