Elan the Bard

{w}{w}: Put a +1/+1 counter on target creature.
Whenever Elan the Bard attacks, roll a D20.
•1: Elan the Bard gets -2/-0 until end of turn.
•2-9: Each defending creature gets -2/-1
•10-19: Creatures can't block this turn
{bull} 20: Creatures can't block this turn. Goad each creature defending player controls.