Overwhelming Encounter
Sorcery
(CMC 5)
Creatures you control gain vigilance and trample 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.