Sargasso the D.D. Battlefield

Field Spell

Each time a monster is Xyz Summoned: The Summoning player takes 500 damage. During each player's End Phase, the turn player takes 500 damage if they control a face-up Xyz Monster.

Rulings – Yugipedia

Printings:

Judgment of the Light: JOTL-EN061 (Common) - 2013-08-08

Prices:

Cardmarket: 0.14 €
TCGplayer: $ 0.14