Divine Condemner

Flying, Haste, Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
Whenever you cast Divine Condemner, creatures
you control get +2/+2 until end of turn.
Whenever you assign attackers, if you control
creatures with a total power of 15 or more,
creatures you control gain flying and trample
until end of turn.