The zombies that have been burned to ashes has dropped a lot of loot. Mostly, they were purplish crystals full of death aura. These crystals were dropped on the ground of the tunnel, some buried inside the sand or hidden within the fire.
But nothing could hide from Feng senses who had been spreading his divine energy for a while. His divine energy was in the shape of threads. Many golden threads that are visible to the eyes extended from his body and crawled all over the cave. These threads entangled with the purplish crystal and Strengthening crystals. With a single swipe of his hands, the threads pulled back towards him, carrying all of the mystical crystals dropped on the ground towards him. Feng had deep pockets but they weren't big enough to store all of these things that numbered in the thousands.
Naturally, these were the times when his gramps house has any uses. Opening a portal to another world, he stored this massive loot into Deicide's soul space.