Chaos Imps is a rare Creature — Imp card from Return to Ravnica (RTR), collector number 90. Current market price: $0.26 (foil $0.39), TCGplayer market prices via Scryfall.
Flying Unleash (You may have this creature enter with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.) This creature has trample as long as it has a +1/+1 counter on it.