Treebeard, Ent Leader

Trample, Reach
Other elementals you control get +1/+1. If they
are Ents, they get an additional +1/+1.
You may exert Treebeard, Ent Leader when it
attacks. If you do, choose one:
•Treebeard, Ent leader gains forestwalk until end
of turn
•Destroy target artifact.