Cheapest priced copy (Battle for Zendikar): $0.69 at Card Kingdom, near mint, their price list as of .
Gruesome Slaughter 
Sorcery · Rare · Battle for Zendikar · #9
Until end of turn, colorless creatures you control gain "{T}: This creature deals damage equal to its power to target creature."
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.69 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Battle for Zendikar | 9 | Rare | $0.69 | $0.79 |
| Battle for Zendikar Promos | 9s | Rare | — | $1.99 |