Uunleash elements is a level 81 talent, which every shaman gets by default. If it makes the macro hang it's almost certainly because you had no active weapon imbue (i.e. you forgot to apply flametongue on your weapon). Not to be confused with the level 90 talent called Unleashed Fury, which is not a spell in itself but a passive ability. Regardless of that, using unleash elements is a dps decrease for ele shaman in pve in the current patch, hence why I asked why you had it in the macro.
Connect With Us