(Verb) To twist one's auras. Twisting auras is a MMO term that means when a character that emits buff giving auras changes their current aura for a different one. Depending on the game, sometimes the aura or chant will retain for a few seconds after it has been cancelled, allowing another chant or aura to be up at the same time. Twisting is therefore used to keep multiple buffs up at once.
If that knight stands there twisting his auras, the group can get up to three powerful buffs at once.