Tree of Aeons 6 : An Isekai LitRPG Adventure (Tree of Aeons‪)‬

Aeon's expansion has finally attracted the attention of the demons, and they've sent a demonic comet headed towards Aeon's world.

Aeon and the Order will now have to plan, build new weapons and tools, expand their forces, learn new powers, and equip themselves to deal with the massive comet that threatens to reset all the progress they've made.

Book six of an epic reincarnation/isekai LitRPG story about a man who becomes a tree, growing and progressing throughout the ages in an eternal conflict against a demon incursion.