Israfiel Vultee

: Whenever a creature attacks Israfiel Vultee, you may have him deal damage to that creature equal to the number of loyalty counters on him.
+1: Target knight you control with first strike or double strike gains +2/+2 until end of turn.
-1: Knights you control with first strike or double strike gain protection from the color of your choice and vigilance until end of turn.