Cheapest priced copy (Commander Legends): $0.35 at Card Kingdom, near mint, their price list as of .
Molder Beast 
Creature — Beast · 5/3 · Common · Commander Legends · #243
Trample
Whenever an artifact is put into a graveyard from the battlefield, this creature gets +2/+0 until end of turn.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
2 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Legends | 243 | Common | $0.35 | $0.49 |
| Scars of Mirrodin | 125 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 1 January 2011If Molder Beast and an artifact creature are both involved in combat during the same combat damage step, and that artifact creature is destroyed due to lethal combat damage, Molder Beast's triggered ability will trigger — but it will get the bonus too late to affect that combat.