pre order pokemon booster box 7/16) Pitch Black Bundle in the Pokémon TCG Pokemon TCG: ME04: Chaos Rising

Other than that, the deck choices I think are self explanatory

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During your Main Phase: You can send this card on the field to the GY along with 1 or more non-Tuner "Blackwing" monsters from your Deck, so that the total Levels sent equal exactly 8, and if you do, Special Summon 1 "Black-Winged Dragon" from your Extra Deck, also you cannot Special Summon from the Extra Deck for the rest of this turn, except DARK monsters

Commander and Oathbreaker can both work in the same ecosystem and are not mutually exclusive

Then we can discard massive artifacts like Portal to Phyrexia, Triplicate Titan, and Phyrexian Triniform that we can cheat back into play

Commander's Insignia