Sidisi's Faithful

Exploit grafted onto a 0/4 reads like a contradiction: a defensive shell that wants to die. The whole design hangs on the fact that exploit triggers when the creature enters, so the sacrifice and the bounce both resolve up front, before this thing ever blocks. That timing is the crux. You are not holding up a wall and cashing it in later; you choose at entry whether to feed the exploit a creature (often a token, a spent value body, or even the Faithful itself) and return any creature to hand. The self-sacrifice line is the elegant part, because exploit permits the entering creature to eat itself, so a single card can bounce a target without committing anything else to the trade. The return clause reads "target creature," your own included, which is what turns it into a recursion lever rather than a removal spell: sacrifice a body you have already drained value from, then bounce one of your own enters-the-battlefield creatures to run the whole sequence again. Pointed at an opponent it is soft, sorcery-speed disruption, a one-shot tempo swing locked to the turn it lands; left to sit afterward, the 0/4 reverts to exactly what its body says, a fat blocker that clogs the ground. The card pays off a deck stocked with cheap, reusable fodder and bounce-friendly bodies, where each cast resets a problem and the wall holds the line in between.