Cheapest priced copy (Commander 2019): $0.99 at Card Kingdom, near mint, their price list as of .
Deathmist Raptor 
Creature — Dinosaur Beast · 3/3 · Mythic · Duskmourn: House of Horror Commander · #176
Deathtouch
Whenever a permanent you control is turned face up, you may return this card from your graveyard to the battlefield face up or face down.
Megamorph {4}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
4 printings · $0.99 to $2.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2019 | 160 | Mythic | $0.99 | — |
| Duskmourn: House of Horror Commander | 176 | Mythic | $0.99 | — |
| Dragons of Tarkir | 180 | Mythic | $1.29 | $2.99 |
| Murders at Karlov Manor Commander | 168 | Mythic | $0.99 | — |
5 rulings from Wizards of the Coast
- 25 February 2015Turning a face-down creature with megamorph face up and putting a +1/+1 counter on it is a special action. It doesn't use the stack and can't be responded to.
- 25 February 2015If a face-down creature with megamorph is turned face up some other way (for example, if you manifest a card with megamorph and then pay its mana cost to turn it face up), you won't put a +1/+1 counter on it.
- 25 February 2015Deathmist Raptor's second ability triggers only if Deathmist Raptor is in the graveyard when a permanent you control is turned face up.
- 25 February 2015You choose whether Deathmist Raptor will enter the battlefield face up or face down as the ability resolves. You may also choose to leave it in the graveyard.
- 25 February 2015Megamorph is a variant of the morph ability. You can find more information on morph on cards with morph from the Khans of Tarkir set.