Kallispo, Rose of War

Warlord - Exert and tap Kallipso, Rose of War.
As long Kallipso, Rose of War is your warlord,
whenever you exert a creature, that creature
gains +2/+2 until end of the turn.
Exert an unexerted attacking creature you
control: Kallispo gain hexproof, first strike or
trample until end of the turn.