Bask in the Light

When Bask in the Light enters the battlefield, you may sacrifice any number of Spirit creatures. For each creature sacrificed, put a charge counter on Bask in the Light.
At the beginning of your upkeep, put a charge counter on Bask in the Light, then gain life equal to the number of charge counters on it.
Enjoy life while it lasts. Like all good things, one day it will come to an end.