Creatures you control gain vigilance (Attacking doesn't cause this creature to tap.) and trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) until end of turn. Roll a d20.
1-9 | Creatures you control get +2/+2 until end of turn.
10-19 | Put two +1/+1 counters on each creature you control.
20 | Put four +1/+1 counters on each creature you control.