Lucy Heartfilia, of Fairy Tail

Summon Spirit - Whenever this creature
attacks, roll a d20.
1-9 |Create a 3/3 Green Spirt creature
token with haste onto the battlefield. Sacrifice
it at the beginning of the next end step.
10-19 |Create a 6/6 Blue Spirt creature
token with haste onto the battlefield. Sacrifice
it at the beginning of the next end step.
20 |Create a 12/12 White Spirt creature
token with haste onto the battlefield. Sacrifice
it at the beginning of the next end step.