As the first of its kind the realm wurm was wondering around the world eating all kinds of energy. It didn't have to worry about others of its kind taking all the energy so it was quickly reaching its limit. As it finished eating the last of a water element cluster the realm wurm had finally reached its limit.
Programed into its instincts it started to return to the realm tree, it would take a while before it reached the roots of the realm tree. When it finally did it only had a day left in its life, it found a nice location pretty close to the bottom of the roots and closed its eyes, awaiting its death.
As the clock ticked down the energy that resides inside its body started to convulse, tearing at his skin and leaking into the surrounding area. And after a couple more second it opened its eye full of pain and just enjoyed the view of the realm tree.
With a burst of chaotic energy the realm wurm no longer lived physically in the world. The chaotic energy it released condensed quickly to form a small world, barely perceptible if one wasn't trying to find it. The energy continued to flow into the small realm until there was no more, just a gentle pull of the surrounding energy around it that would all it to continually grow slowly.
The conscience of the realm wurm could feel the attention of the realm tree, it nudged it gently to descend into his realm and rest in a safe location. His realm was beautiful, a small planet made of all his hard work, beautiful landscapes with crystal clear waters, the world had so much mana that it formed a thick fog around the world.
He found a small little island in the center of a great sea, there he found a small little hill in a forest clearing. With one last look at its world it drifted off too sleep inside the small hill.
"Your journey does not end here my friend..."
A small little sapling grew from the hill where the souk of the realm wurm choose the sleep. The sampling drew in the surround mana using it to speed ups its growth, when it reached a height of 40 meters it slowed down, stopping around 43 meters.
The soul of the realm wurm was slowly pulled into the giant tree, serving as a new body and a form of protection for the realm wurm.