Robin, Just Intonation

Whenever another nontoken creature you control attacks, put a +2/+0 counter on each attacking creature until the end of this turn. After this phase, Robin deals damage equal to the number of modified nontoken creatures you control to target creature or planeswalker an opponent controls.

{1}{g/w}, {t}: Other creatures you control gain vigilance until the end of this turn. Robin doesn't untap during your next untap step.