The Agent of Judgment - Saturn (DR2-EN118) - Dark Revelation Volume 2 Unlimited

If your Life Points are higher than your opponent''s Life Points, activate this card''s effect by offering this card as a Tribute from your side of the field. Inflict damage to your opponent''s Life Points equal to the difference between your and your opponent''s Life Points. If The Sanctuary in the Sky is not on your side of the field, this effect is not applied. When you activate this effect, you cannot conduct your Battle Phase this turn.