Saria, Friend to the Lost

Whenever Saria, Friend to the Lost or equipped creature attacks, add an amount of {g} equal to its
power. Until end of turn, you don't lose this mana
as steps and phases end.
Reconfigure {3} ({3}: Attach to target creature you control; or unattach from a creature. Reconfigure
only as a sorcery. While attached, this isn't a
creature.)
Saria awakens as a sage and adds her power to yours.