Skittering Heartstopper

A repeatable deathtouch toggle on a one-mana body, which makes it less a creature than a permanent combat threat the opponent has to play around every turn. The activation costs black mana but no tap, so the deathtouch applies while the creature is attacking, blocking, or both: a 1/2 that trades with anything in the red zone the moment you leave one black untapped. That open mana is the whole negotiation. An attacker has to decide whether the small body is bluffing or holding the threat of a one-for-one trade against something far larger, and a blocker can sit back and tax every alpha strike. The design trades raw power for persistence: the effect never expires the way a one-shot combat trick does, it just sits on the board renewing each turn for as long as you can pay. That puts it in the long lineage of cheap deathtouch enablers, the small bodies that turn a single point of damage into a deterrent, where the value is not in what the creature does but in what it stops the opponent from doing.