Mind of tempest
(he/him)advocate for 5e psionics
if you want to be technical the voice has more in common with divine or psionic casting as it works purely on revelations not book learning and rarely on blood.Spells gained like boons that have three levels of power? (basically upcasting).
Give a "dovakiin" a fighter class with half casting and shout spells (i tested using paladin chassis, it was okay).