Wabbajack

Indestructible
Equip {3}
Equipped creature gains +X/+X where X is the
number you roll on a 20 sided die, and indestructible.
Equipped creature has the
ability to roll a 20 sided die.
1-5 it deals 5 damage to each player
6-10 the game ends in a draw
11-15 each player gains infinite mana for one turn
16-20 restart the game