Arcbound Fiend is a uncommon Artifact Creature — Horror card from Darksteel (DST), collector number 96. Current market price: $0.36 (foil $3.58), TCGplayer market prices via Scryfall.
Fear (This creature can't be blocked except by artifact creatures and/or black creatures.) At the beginning of your upkeep, you may move a +1/+1 counter from target creature onto this creature. Modular 3 (This creature enters with three +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)