Jinx, Loose Cannon

When Jinx, Loose Cannon attacks, roll a D20:
•1: Jinx deals 5 damage to its controller and sacrifices itself.
•2-9: Jinx, Loose Cannon deals 1 damage to its controller
•10-19: Jinx, Loose Cannon gains +2/+2 until end of turn
{bull}20: Put three +1/+1 counters on Jinx, Loose Cannon, and she gains double strike until end of turn.