When a psion who follows the path of the kineticist reaches level 9 (or when any other psion or wilder reaches level 12 and takes Expanded Knowledge) they gain access to the psionic power fiery discorporation.
As long as the psion has 9 power points (and a way to manifest the power, either himself or with an item), and as long as there is a fire source somewhere near (like a carried torch or an eternal flame; perhaps stored in an extra-dimensional bag to keep it safe), the kineticist basically cannot die:
Any damage that would reduce you to 0 hit points or lower instead has a chance to discorporate you [...].
He will respawn to the nearest open flame ; there is no limitation specified about this by the way, the distance could even be extra-dimensional if necessary.
As a DM this poses two issues:
- For PCs: How can I "scare" a kineticist during encounters? Players generally fear for their character's live and will be reluctant to sacrifice themselves to save others. A kineticist won't even hesitate because he can always resurrect freely without suffering from a level penalty and this can easily be exploited.
- For NPCs: I'm suspecting a villain that can use this power could be a very dangerous adversary. Let's say the encounter happens in a molten fortress or a volcano, the PC cannot kill their enemy at all (especially if the enemy is under a dimensional anchor effect). How can I balance it to make it a fun and challenging encounter?