Quote Originally Posted by Marc-Vigar View Post
It does cost, you can't use it at 0 mana so it requires good management and it will lose it's value if you don't use it at the perfect time.
And in any actual fight that it matters ex and savage you manage your resources and dont just use it because hey its ready and i have mp. Proper management and knowing the fight tbn is hands down the single best buff no contest.