Druid Justicars

When Druid Justicars enters the battlefield, untap up to two target creatures.
Whenever Druid Justicars attacks, until end of turn it gets +1/+1 for each card in exile you own.
Green creature spells you cast cost {2} less to cast
"The time for pacifism and meditation has passed, they have no yielded to our warnings. Now is the time for war." -Kvothe