Cheapest priced copy (Darksteel): $0.35 at Card Kingdom, near mint, their price list as of .
Arcbound Hybrid 
Artifact Creature — Beast · 0/0 · Common · Darksteel · #97
Haste
Modular 2 (This creature enters with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
1 printing · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Darksteel | 97 | Common | $0.35 | $0.99 |
One ruling from Wizards of the Coast
- 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.