Teldrassil

Teldrassil enters the battlefield tapped.
{t}: Add {g} or {u}.
Teldrassil was the name given to the island, but only
as an afterthought. The island was only an extension
of the true Teldrassil... a titanic tree filling most of the
land rising so high, the top vanished in the clouds. Its branches were so vast that they dwarfed some
kingdoms. The thick crown could have housed an
entire civilization - and did.
- A description of the World Tree