Most of them are utility spells like summons, auras, teleport, mindblast, telekinesis, enchant, cold armors, blade shield, armageddon and so on are right click only because they're secondary effects
Almost all "combat" spells except maybe a couple nextdelay spells (I think meteor and hydra are right click only?) are left and right click
This post was edited by Worrywart on Dec 8 2018 06:14pm