The Moon Goddess, Selûne

The Moon Goddess, Selune Enters with 2 lunar
tokens and X = 1.
At the beginning of your upkeep, remove a lunar
token. When this creature is out of lunar tokens,
Pay X{u} or else this creature is destroyed. After
this, add 2 lunar tokens and increase X by 1
If you remove a lunar token and this creature
still has lunar tokens on it, X{u} is added to your
mana pool