"Fantasia" is episode 306 of the Berserk manga series.
Synopsis[]
A massive white tree.
All over the world, fantastic creatures like dragons, giants, goblins, trolls, elves, swamp monsters, brownie, Accursed Spirits and a headless horseman, all spring into being. All of them were entities long since dreamed up by sleeping or imaginative humans, and Ganishka's light has heralded their arrival into the physical world. Even the God Hand seem to have been able to reach the physical world.
The Band of the Falcon stare up at the completely white tree that stands where Ganishka once was.