Nissa, Forest's Might

+1: Attacking green elementals you control get +1+0 until end of turn.
-2: Target elemental you control fights up to one target creature you don't control. None of those creatures can be regenerated.
-8: All Forests you control become 4/4 elemental creatures. They're still lands. Search your library for 10 forests, and put them on the battlefield.