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The Demon King of Death laughed heartily as he managed to pierce through the spiritual tree, Yggdrasil, the "true body" of Planta thanks to the efforts of Fafnir, his loyal retainer.
"Haha…. HAHAHAHA! I DID IT… I DID IT!"
FLUOSH!
In the very moment he felt his sword body slicing through hard wood, he immediately began to infect the origin of this wood, the tree, with all the Nether he could afford, filling the tree's essence of purity and spirit energies, and especially of life, with their total opposites.
Death, nether, phantasmal energies and even demonic energies filled the tree's interior, rapidly infecting its wood and transforming it into something aberrant.
"You will become my new body, my new familiar, my new power! I shall name you Qliphoth, the Demonic Tree of Death!"
The Demon King of Death already had a plan to go with and he would see it being fulfilled to the very end.