Gragonith, Lightsworn Dragon

Level 6 LIGHT/Dragon Effect Monster
2000 ATK / 1600 DEF

This card gains 300 ATK and DEF for each "Lightsworn" monster with a different name in your Graveyard. If this card attacks a Defense Position monster, inflict piercing battle damage to your opponent. During each of your End Phases: Send the top 3 cards of your Deck to the Graveyard.

Rulings – Yugipedia

Printings:

Light of Destruction: LODT-EN025 (Common) - 2008-05-13
Dragons Collide Structure Deck: SDDC-EN010 (Common) - 2012-02-03
Realm of Light Structure Deck: SDLI-EN005 (Common) - 2014-06-27

Prices:

Cardmarket: 0.07 €
TCGplayer: $ 0.01