Dehl'nya, The First Dryad

Immortal (spells and abilities cannot reduce this
creature's toughness less than 1.)

The First Dryad is all colors.
The First Dryad cannot attack or block unless
you control Tree of the First Dryad.
{2}: All lands gain a basic land type of your choice
in addition. Any player may activate this as a
sorcery.