Glaring Fleshraker

The colorless-matters payload built into a single body: cast a colorless spell and get an Eldrazi Spawn, then have that Spawn (or any other colorless creature) trigger a Pinger's worth of damage on arrival. The clever part is how the two abilities feed each other. The Spawn tokens the first ability makes are themselves colorless creatures, so each one you generate off a colorless spell can, in turn, be the creature that pings your opponents when it enters. What looks like a slow value drip becomes a compounding drain the moment you can churn colorless permanents onto the battlefield in quantity, and the Spawn double as sacrifice fuel to power out the next colorless cast. The design leans hard into a color-identity constraint that most decks ignore: it does nothing unless your spells and creatures actually shed their color pips, which is why it belongs with the wave of cheap colorless creatures and eldrazi-scaled ramp rather than in any conventional aggro shell. The 2/2 body is beside the point; the card is an engine that turns a critical mass of colorless permanents into inevitability, one point of noncombat damage at a time.