Artifact Creature — Horror 0/0, 6 (6)
Uncommon
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 Arcbound Fiend.
Modular 3 (This enters the battlefield with three +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)
Illus. Ittoku

12/1/2004: The creature that's targeted by Arcbound Fiend's middle ability doesn't have to have any +1/+1 counters on it. If it doesn't have a counter on it when the ability resolves, nothing happens.
9/25/2006: If an Arcbound creature gets enough -1/-1 counters to make its toughness 0 or cause the damage on it to now be lethal, the Modular ability will still give another artifact creature a number of +1/+1 counters equal to the number the Arcbound creature had before it got -1/-1 counters.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern