Sootstoke Kindler

Haste granters that aren't themselves the payoff are a quiet design problem: the effect only matters if the creature you're rushing into combat is worth rushing, and a 1/1 body for two doesn't make that case on its own. This one solves it by being repeatable and color-locked. The tap ability hands haste to any black or red creature, turn after turn, so it isn't a one-shot trick stapled to a body but an enabler that turns a board of fresh recruits into immediate threats every time a fattie hits the table. The black-or-red restriction is the leash: it can't grease a five-color goodstuff pile, only a deck built around the two colors it prints in, so the payoff has to come from the same pairing that made it. Its own haste is doing work you'd never guess from the line: without it, a tapper is dead the turn it enters, because the ability can't fire while the creature has summoning sickness. Haste is precisely what lets a creature use a tap ability the turn it arrives, so this thing can grant haste immediately, the moment it lands. The structural job is the one a sacrifice outlet or a recursion engine does in these colors: convert a creature's text into a recurring resource, here the resource being "attacks the turn it lands." A card like this lives or dies on the quality of the haste targets around it, which keeps it scaffolding rather than a standalone threat.