Monster Mosh Pit

For each opponent, choose 3 permanents. Your opponents must then agree on two of your permanents. For each permanent chosen this way, its owner must roll a d20:

1 to 10 - They sacrifice that permanent.
11 to 19 - They draw a card and gain 5 life.
20 - They draws 3 cards, gain 10 life and may choose another permanent for the Monster Mosh Pit.