Under the Celestial Shadow

Abilities that are triggered or can be activated while Sunlight or Moonlight is in effect are triggered or can be activated regardless of any turn.
At the beginning of each player's upkeep, If he or she has 10 or more life, he or she loses half of his or her life total, rounded up.
"...and the sun has perished out of heaven, and an evil mist hovers over all." - The Odyssey