Ulna Alley Shopkeep

Infusion is a lifegain payoff built to survive being read backwards: the condition sits low enough that you almost never have to warp a deck to meet it. Any incidental point of life this turn, from a random drain trigger to a lifelink swing that already happened, flips the switch, and the base 2/3 becomes a 4/3 that two blockers cannot casually gang up on. Menace is the piece that turns the buff into pressure rather than a stat check: with the body at four power, an opponent has to commit two creatures to stop it, and those blockers now have to split four damage between them, enough to trade with something on the way through. The design keeps the reward honest by attaching it to power alone, not toughness or evasion, so the swing is entirely about how hard it hits, not how well it blocks. What it asks of a deck is small: a lifegain enabler that would already be in the list for its own sake, at which point this rides along as a three-drop that hits like a four-drop the moment the incidental-lifegain plan is online. It is an aggressive black common that wants the lifegain shell to already exist, filling the curve slot where a menace beater needs to close a game the lifegain plan opened.