Mind of tempest
(he/him)advocate for 5e psionics
those do not feel all that different to me, you go it in less dnd as I somehow grasp mythic more than I logically should.In terms of thematics:
Void = space-time, demiplane, teleportation, chronomancy, Haste, Slow, Time Stop, empty space, outer space
Ether = ethereal plane, border ether, fey ether, shadow ether, force, force damage, gravity, telekinesis, Fly, force construct, Wall of Force, Unseen Servant, Magic Missile, Shield, Mage Armor, quintessence, magical energy, solid illusion, conjuration, dunomancy