In one of the recent manga chapters, we noticed that Yamamoto had gone completely berserk in order defeat Juha Bach. This fantastic image was inspired by the awesome and powerful Bankai, Zanka No Tachi, South! It was ignited after Juha Bach had mentioned that nothing can get past the defense of a Quincy.
Yamamoto activates this technique by thrusting his sword towards the ground then calling upon the corpses who were killed by his flames and turned into ashes, to fight for Yamamoto for a certain amount of time. Using the heat of his sword on their ashes, he is able to rouse the people he previously killed who can act as his limbs and attack for him.
The crazy and wonderful image of Yamamoto was drawn by Fhalei. She’s got some other impressive fan art from other anime’s which you should definitely check out.