Astral Seed

You plant a fragment of your own mind into the Astral Plane (or into another mind), where, given time and concentration, it grows into something larger: a demiplane, a dream, or a copy of yourself.

Demiplane

You create a shard of your own mind within the Astral Plane. Thereafter, the shard can slowly grow a demiplane of your own devising, which you can mentally visit at any time through meditation. The demiplane begins as a single "room" and expands by approximately one room per day of focused effort.

At a certain point, you can establish enough presence in your demiplane such that, if you die in another plane, your mind reforms inside the demiplane. This power does not itself grant you the ability to create a new physical body, but you could use other powers to create one, repair the old one, or possess someone else's.

Inception

You plant a seed-idea in the dreams of a sleeping creature. The idea must be simple (a single conviction, image, or impulse). The target gets a Wis save; on failure, the idea takes root and influences their waking decisions for one day per rank.

Mind Seed

A more aggressive variant: you plant a copy of your own personality into a target's mind. Over time (days to weeks, depending on rank and target's resistance), the copy grows and eventually replaces the original, leaving a duplicate of yourself wearing the target's body. This is a deeply taboo use of the power.

(Specifics, save DCs, and timeline TBD.)