Axe thumb
The Celestials have always protected the warriors of Order. The Enochian Axe was their gift to the human race, and it in turn swore to watch over the balance of powers in the Earthen realm

+17% damage dealt by units to defensive buildings

Your Brotherhood must come 1st or 2nd-5th place in the tournament

Enochian Axeis the one of many artifacts that can be won in Bastion of Horror tournament. Released in June 2015.