White Lotus

White Lotus cannot be countered,
destroyed, or exiled.
Your life total cannot change.
At the beginning of your upkeep, return
White Lotus to the battlefield under its owner's control.
At the beginning of your upkeep, each opponent
takes {x} damage and you gain life equal to the
amount of damage dealt this way.
{t}: Add 3 mana of any color to your mana pool.