Branch Guardian

When Branch Guardian enters the battlefield,
create a 1/1 green Saproling creature token
if {g} was spent to cast Branch Guardian.
When Branch Guardian enters the battlefield,
create a token that's a copy of a creature token
if {w} was spent to cast Branch Guardian.
Evoke {g/w} (You may cast this spell for its evoke cost.
If you do, it's sacrificed when it enters the battlefield.)