Justin, Exemplar of Honor

Flying, vigilance
Whenever Justin, Exemplar of Honor attacks,
honor target attacking creature you control.
(If it isn't honorable, put a +1/+1 counter on it and
it becomes honorable.)
Whenever another creature becomes honorable,
if Justin, Exemplar of Honor is honorable, it
deals 2 damage to any target and you gain 2 life.