what pokemon booster box to buy - Mega Evolution - Pitch Black Shadows deepen and nightmares become reality in the Pokémon TCG Pokémon TCG: Scarlet & Violet-151

I am missing something

But I would avoid the trap of buying singles from them at all

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")

The stickered permanent could be Sanguine Sipper itself or another permanent you control