Farhyn, Scion of the Wilds

Creature spells you cast cost {1} less to cast
for each other creature spell you've cast
this turn. This can't reduce the mana cost
of a creature spell to less than one mana.
She closed her eyes, reaching out the soul of the
woods with her heart and mind. When she
reopened her eyes, she stood before ten thousand
beasts and birds.