Cheapest priced copy (Dragons of Tarkir): $0.49 at Card Kingdom, near mint, their price list as of .
Profaner of the Dead 
Creature — Snake Wizard · 3/3 · Rare · Dragons of Tarkir · #70
Exploit (When this creature enters, you may sacrifice a creature.)
When this creature exploits a creature, return to their owners' hands all creatures your opponents control with toughness less than the exploited creature's toughness.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
3 printings · $0.49 to $1.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dragons of Tarkir | 70 | Rare | $0.49 | $0.99 |
| Dragons of Tarkir Promos | 70s | Rare | — | $1.49 |
| The List | DTK-70 | Rare | $0.49 | — |
6 rulings from Wizards of the Coast
- 25 February 2015A creature with exploit “exploits a creature” when the controller of the exploit ability sacrifices a creature as that ability resolves.
- 25 February 2015You can sacrifice the creature with exploit if it’s still on the battlefield. This will cause its other ability to trigger.
- 25 February 2015You can’t sacrifice more than one creature to any one exploit ability.
- 25 February 2015You choose whether to sacrifice a creature and which creature to sacrifice as the exploit ability resolves.
- 25 February 2015If the creature with exploit isn’t on the battlefield as the exploit ability resolves, you won’t get any bonus from the creature with exploit, even if you sacrifice a creature. Because the creature with exploit isn’t on the battlefield, its other triggered ability won’t trigger.
- 25 February 2015Use the toughness of the exploited creature as it last existed on the battlefield to determine which creatures to return to their owners’ hands.