D/D/D Wave Oblivion King Caesar Ragnarok

Level 10 DARK/Fiend Fusion Effect
3200 ATK / 3000 DEF

2 "D/D/D" monsters
Once per turn, when an attack is declared involving this card: You can target 1 other "D/D" or "Dark Contract" card you control; return it to the hand, and if you do, equip 1 face-up monster your opponent controls to this card, except the battling monster. This card gains ATK equal to the combined original ATK of the monsters equipped to it by this effect.

Rulings – Yugipedia

Printings:

Dimension of Chaos: DOCS-EN044 (Super Rare) - 2015-11-05
2016 Mega-Tin Mega Pack: MP16-EN138 (Super Rare) - 2016-09-01

Prices:

Cardmarket: 1.33 €
TCGplayer: $ 0.76