Gorgon's Head
Deathtouch as a portable property, sold cheap and stapled to any body you can keep on the battlefield. The math is the appeal: a creature with deathtouch trades up against anything, so equipping the smallest available attacker turns it into a removal threat that the opponent has to answer or block badly. Equipment is the right chassis for this because the keyword survives the creature it sits on; kill the carrier and the head slides onto the next one, which makes a single token or a recurring one-drop into a repeatable deterrent. The friction lives in the equip cost outpacing the equipment itself: it costs more to move the head than to cast it, which favors a stable board over a churning one and punishes over-extension into a sweeper that erases both the creature and the investment of attaching. Compared to deathtouch sources that come welded to a body (Typhoid Rats, Thornweald Archer), the detachable version trades a guaranteed blocker for flexibility about which creature wears the threat, and the option to redirect it after a trade. It is plain, colorless, and unfussy, the kind of cheap deathtouch enabler that asks only for a creature worth protecting and a board worth defending.
