Gaia heard Zero's request and thought about it. Nobody has tried growing or creating a new World Tree even if it was theoretically possible simply because finding a place to plant it was troublesome. Many world trees have died from different causes and while it should be easier to replace the dwindled population of world trees, not all world trees were very willing to give their flowers or stems for cross-breeding.
"I have no problems birthing a new type of tree," the Tree of Life said and Gaia nodded. Having the Tree of Life act as the mother was still better than trying to grow the new type of tree by manual cross-pollination techniques of the dryads.
The only problem now was to get the Weeping Willow, also known as the Tree of the Future, to part with a flower for that purpose.
"Why can't we ask the Tree of Knowledge for help?" Zero asked Gaia and Mother Nature shook her leaves.