Fuse a legendary champion from the Asgard Divide - Thor Faehammer!
Thor is a powerful attacker, buffing himself before unleashing a myriad of powerful AoE attacks upon his enemies. The Thunder counter passively increases Thor's damage further, culminating in another attack that stuns his foes.
In order to fuse Thor, you'll need four copies of the epic champion, Dyana Gloompiercer. Grab Dyana's fragments from various events and tournaments, and start fusing!
Have fun, and happy raiding!