Unlike - say - Dragonspeaker Shaman, you can use this to pay coloured mana
As a mono-black legend, he provides a free sacrifice outlet, a card-draw engine, and a removal tool all in one card
Game8's list of Darkness Type Pokemon Cards for Pokemon Trading Card Game Pocket (PTCG Pocket)
Size: 17 x 23 cm (6.7 x 9 inches), compact yet spacious Capacity: Holds up to 400 cards (50 double-sided pages, 4 slots per side) Pocket Size: 6.5 x 9 cm (2.55 x 3.54 inches), perfect fit for Pokemon, Yu-Gi-Oh!, Magic, and more Material: Durable PU leather cover with smooth zipper closure Design: Bold Mewtwo artwork with vibrant detailing that stands out in any collection Portable: Includes a comfortable wrist strap for easy carrying Protection: Waterproof, dust-proof, and prevents bending, fading, or scratches Perfect for: Pokemon collectors, trading card gamers, and anime fans who want to show off their collection in style!
Be realistic when grading condition yourself