Cheapest priced copy (Commander 2011 Oversized): $0.49 at Card Kingdom, foil, near mint, their price list as of .
Numot, the Devastator 
Legendary Creature — Dragon · 6/6 · Rare · Commander 2011 · #215
Flying
Whenever Numot deals combat damage to a player, you may pay {2}{R}. If you do, destroy up to two target lands.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.49 to $59.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2011 | 215 | Rare | $1.99 | — |
| Commander 2011 Oversized | 215 | Rare | — | $0.49 |
| Planar Chaos | 160 | Rare | $2.49 | $59.99 |
One ruling from Wizards of the Coast
- 1 February 2007You choose the targets when the ability is put on the stack, and you choose whether to pay when it resolves. You may choose zero targets. You can pay the mana even if you chose zero targets.