Cheapest priced copy (Onslaught): $5.99 at Card Kingdom, near mint, their price list as of .
Grinning Demon 
Creature — Demon · 6/6 · Rare · Onslaught · #153
At the beginning of your upkeep, you lose 2 life.
Morph {2}{B}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $5.99 to $49.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Onslaught | 153 | Rare | $5.99 | $49.99 |