The Hive Mind

{3}Deal 3 damage to a creature on the board
{x}Deal damage equal to energy spent,
heal that much
If this creature kills another creature, heal 2,
if over health displayed add counters.
That is what we found, in the core of the planet.
Mercer calls it the Hive Mind.
It's the source, controlling the Necromorphs telepathically.