Back attack
From NexusWiki
Enables attacking behind you, as well as infront of you in the same time.
Mana Cost - 90
Aether Delay - 0 Seconds
Duration - 10 minutes, 25 seconds. (625 seconds)
Target - Self.
Level to learn - 15
Required items to learn - 3 
Antlers, 20 
Snake meat, 100 coins.
