Cheapest priced copy (Commander 2014): $0.35 at Card Kingdom, near mint, their price list as of .
Panic Spellbomb 
Artifact · Common · Scars of Mirrodin · #191
{T}, Sacrifice this artifact: Target creature can't block this turn.
When this artifact is put into a graveyard from the battlefield, you may pay {R}. If you do, draw a card.
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
3 printings · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2014 | 259 | Common | $0.35 | — |
| Commander Anthology Volume II | 208 | Common | $0.35 | — |
| Scars of Mirrodin | 191 | Common | $0.35 | $0.49 |