Gibbering Fiend

Devils are red's reach-on-a-stick tribe, throwing damage on the way in or the way out, and this one extends the idea by making the reach recur rather than fire once. The enter-the-battlefield ping is unconditional, a guaranteed point of incidental damage the turn the body lands, the kind of nudge that closes out a race a turn early. The delirium upkeep trigger is what changes the card's job entirely: it converts a small body into a recurring drain that ticks down opposing life while you do nothing, attack with nothing, and risk nothing in combat. The catch is delirium's gate, which demands a graveyard stocked with enough different kinds of cards to turn the ability on. That gating is the bargain: a 2/1 that pings on arrival would be forgettable, but one that keeps pinging without ever needing to swing is doing the work an enchantment usually does, sitting on a body that can still apply pressure on the ground. The deckbuilding cost is that you have to feed the yard, so the reward naturally lands in a base that spills instants, sorceries, creatures, and the odd destroyed artifact or land into the graveyard. The reach is repeatable rather than one-shot; the price is that you have to build a graveyard worth turning on.