Venom, Evil Unleashed

A five-mana 4/5 deathtouch body plays defense in the way deathtouch always has: it gates the ground, makes any attacker's swing a losing trade, and dares the opponent to spend real resources dislodging it. The wrinkle is what happens after it dies. Once in the graveyard, the self-exile activation converts the corpse into a one-time pump: two +1/+1 counters on a creature and deathtouch for the turn, which turns a modest attacker into something that trades up against anything on the battlefield. The self-exile clause is the constraint that defines the card. This is not a recurring graveyard engine you loop; it is a single deferred payoff, so the card wants to die at a useful moment rather than linger as a permanent resource. The sorcery-speed restriction sharpens that further. There is no ambush from the bin, no mid-combat counter to blow out a surprise block; the graveyard use happens on your own main phase, folded into a planned aggressive turn rather than a reactive one. What unifies both halves is that deathtouch does identical structural work in each: on the battlefield it makes the body a trade nobody wants, and from the graveyard it lends that same lethal-touch math to whichever creature needs to punch above its size, along with a permanent size bump that outlasts the turn.