Druidic Guideline

As an additional cost to cast this spell, return an untapped land you control that could produce {g} to your hand.
Create an emblem with ''Once each turn, you
may return an untapped land you control that
could produce {g} to your hand rather than pay
the mana cost of a green creature spell you cast.''
Flashback—{2}{g}{g}{g}, Discard three land cards
that could produce {g}