Cheapest priced copy (Darksteel): $0.39 at Card Kingdom, near mint, their price list as of .
Arcbound Fiend 
Artifact Creature — Horror · 0/0 · Uncommon · Darksteel · #96
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.)
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
1 printing · $0.39 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Darksteel | 96 | Uncommon | $0.39 | $1.99 |
2 rulings from Wizards of the Coast
- 1 December 2004The 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.
- 25 September 2006If this creature gets enough -1/-1 counters put on it to cause its toughness to be 0 or less (or the damage marked on it to be lethal), modular will put a number of +1/+1 counters on the target artifact creature equal to the number of +1/+1 counters on this creature before it left the battlefield.