You can, of course, play with a mono-black deck, in which case you would want to opt for a mono-black booster box if you can find one, or a least a box known for strong black cards
With only 9 bland cards, there are lots of good swap-ins to choose from in Amethyst and Steel
Expedite alongside Defiant Strike bring the decks cantrip number up to where you want the deck to be
This card also has a fun fact: it's the first time an English Card uses a non-American word variant, as it is Grey instead of Gray
Bakura and Mokuba aren't present, Kaiba only seems to remember Yugi tying him when he lost to him at Death-T and got Mind Crushed, Yugi and Kaiba use the first version of the Duel Disks, etc
Weakness: Darkness (x2) Resistance: Fighting (-30) Retreat: 1 Machop - Fighting - HP70 Basic Pokemon [F] Flicker: Discard the top card of your opponent's deck