These cards make a huge difference to what players can do and greatly limits their options, especially powerful cards such as Sabrini
Suddenly your Leyline Bindings are answering two permanents, your evoke Elementals become super-charged double triggering when they enter the battlefield, your Fable of the Mirror-Breaker is making double the Goblin tokens, and this isnt even considering the possibility of actually building around Elesh Norn in some sort of ETB heavy Soulherder or Ephemerate blink shell

Amazon affiliate links Storage guide Inner sleeveVault X Exact Fit SleevesA snug perfect-fit inner layer double-sleeve valuable cards with these before the matte sleeve goes on.View on Amazon Outer sleeveDragon Shield Matte SleevesMatte, archival-safe outer sleeves the everyday standard for keeping surfaces and edges clean.View on Amazon Rigid holderCardboard Gold Top LoadersPSA-recommended acid-free top loaders rigid protection against bends and scratches on raw high-value cards.View on Amazon Premium binderDragon Shield Card Codex 360A 360-card side-loading portfolio with a padded cover for long-term, display-safe storage.View on Amazon Game data Type Pokmon Element Lightning Stage Basic HP 190 Rarity Ultra Rare Artist Saki Hayashiro LCharge Search your deck for up to 2 Lightning Energy cards and attach them to this Pokmon

Crack the seal to reveal three Collect 151 Gathering slim booster packs (5 cards each), perfect for quick-hit openings or topping up a binder with 151-era favourites
I know its disappointing to lose your C-Sphinx when there could be shenanigans like you and someone else both having them, but you can see how everyone else in the game might not enjoy that quite so much