D/D/D Dragon King Pendragon

Level 7 DARK/Fiend Effect
2600 ATK / 2400 DEF

If this card is in your hand: You can Tribute 1 Dragon-Type monster and 1 other Fiend-Type monster from your hand and/or your side of the field; Special Summon this card. Once per turn: You can discard 1 card; this card gains 500 ATK, then you can destroy 1 Spell/Trap Card on the field. This ATK increase lasts until the end of this turn.

Rulings – Yugipedia

Printings:

2-Player Starter Deck: Yuya & Declan: YS15-END00 (Ultra Rare) - 2015-05-28
Dark Legion Starter Deck: YS15-ENL00 (Secret Rare) - 2015-05-29

Prices:

Cardmarket: 0.58 €
TCGplayer: $ 0.94