Omertius, The Engorged

A monster with telepathy can communicate mentally with any creatures within the listed radius, as long as they share a language. This doesn't give any special access to their thoughts, and communicates no more information than normal speech would.

Omertius sends himself into his target's blood, controlling them as if affected by the spell Possession. The target attempts a DC 30 fortitude check. Omertius can Dismiss the spell at any time. Critical Success The target is unaffected. Success Omertius possesses the target but can't control it. Failure Omertius possesses the target and takes partial control. He no longer has a separate turn; instead, he might control the target. At the start of each of the target's turns, it attempts another Will save. If it fails, it's controlled by Omertius on that turn; if it succeeds, it chooses its own actions; and if it critically succeeds, it forces him out and the spell ends. Critical Failure Omertius possesses the target fully, and the target can only watch as he manipulates it like a puppet. The target is controlled by Omertius.