Insidious Bookworms

A black one-drop whose entire purpose is to die. The body is filler; the death trigger turns chump-blocking, trades, and removal into a discard tax for whoever you point it at. The optional pay-to-fire clause is what keeps the floor harmless: because the trigger costs after the worm is already gone, you commit the mana at the moment of death rather than upfront, so the disruption lands only when you can spare the resources. The body stays a trivial 1/1 attacker until then. The randomness of the discard is the second restraint: this is not a precise hand-attack tool like Duress, but a penalty that punishes the opponent for engaging with the creature at all. It belongs to an early black school of attrition where creatures were sized to die and rewarded you for the trade, a lineage that runs through the death-trigger aristocrats designs that arrived much later. The worm forces the opponent to weigh a worthless 1/1 against the cost of removing it, and in the slow grinding games where every card counts, that small extorting trigger does more work than the stat line suggests.