Ah, thank you for noticing that. It is a 'bug' though a minor one. If i ever happen to have the mod open for whatever reason, I'll look into giving it a proper cost.

Seems like the Lilting Focus passive is already unlocked despite it being a prerequisite for another skill. Might this be a bug?

Ever wanted a class that just...tells the boss to stop hitting itself? Welcome to Psion. You build resources to make the enemies (and yourself!) confused. Or you can slap the boss with a mega brain nuke attack that bypasses all defenses and evasion checks and forces the enemy to hit itself every time it does anything. Really helpful for those pesky enemies that evade magic or can make itself evade.