red yugioh card sleeves YU-GI-OH! Deluxe (2 Pack) : Toys & Games Classic animated series Red Sleeves – Dragon Shield

Do note that the Nightshade Assassin requires a different, more control, deck to function

I think this is only for digital but wonder if it will make its way to actual cards

Put a +1/+1 counter on each creature you control whose name begins with either of the chosen letters

Their key Extra Deck monster however is "Swordsoul Grandmaster - Chixiao", an Extra Deck searcher able to search or banish any "Swordsoul" card from the Deck when summoned (who also has its own negation disruption effect), which enables further extension by searching for more "Swordsoul" starters or banishing a Trap to make a "Swordsoul Token", or to further strengthen the end board by searching a "Blackout" or "Emergence" (for it to search a generic Wyrm boss monster, like "Archnemeses Protos")

~Psychic pokepalace

He can also tap three Advisors, Monks, and Artificers to draw one card