Nissa's Reignition

(When a War enters, choose an opponent to protect it.
You and others can attack it)
When Nissa's Reignition is defeated, search your
library for up to 3 Forests and put them onto the
battlefield. They are 5/5 elementals with
Trample, Vigilance, and Indestructible in addition
to their other types. Create an emblem with "If
you would tap a Forest for mana, add three times
that much mana instead"