Trostani's Bloom

(As this Saga enters and after your draw step, add
a lore counter. Sacrifice after III)
I - Gain 3 life.
II - Populate, gain 4 life.
III - Put {g}{g}{w}{w} into your mana pool. If
Trostani, Selesnya's Voice is cast using this mana
search your library for an aura with casting cost 3
or less and attach it to Trostani, Selesnya's Voice.