Cheapest priced copy (Ikoria: Lair of Behemoths): $0.35 at Card Kingdom, near mint, their price list as of .
Insatiable Hemophage 
Creature — Nightmare · 3/3 · Uncommon · Ikoria: Lair of Behemoths · #290
Mutate {2}{B} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Deathtouch
Whenever this creature mutates, each opponent loses X life and you gain X life, where X is the number of times this creature has mutated.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ikoria: Lair of Behemoths | 93 | Uncommon | $0.35 | $0.49 |
| Ikoria: Lair of Behemoths | 290 | Uncommon | $0.35 | $0.79 |
One ruling from Wizards of the Coast
- 17 April 2020In a Two-Headed Giant game, Insatiable Hemophage’s last ability causes the opposing team to lose life equal to twice the value of X and you to gain X life.