User blog comment:Woest/Great Tree Arc and Green Magic/@comment-4829046-20131125080227

I already brought up the Great Tree Arc and Walrod's magic connection the moment we saw the flashback of FT's founding but I never considered the part about Tenrou(Sirius) Tree.

That's a nice theory. But like Umnei said, Walrod made a beanstalk, not a tree.