Systems Override Loxi: This might be a bit "parasitic" in the sense that it likely doesn't work as well in eternal formats, but BOY is this fun for limited and rotating formats
During the shadowless run, Wizards of the Coast utilized a thinner cardstock that felt slightly more flexible
If you leave the game, the creatures you cloaked with Etrata, Deadly Fugitive's triggered ability are exiled
So in light of the Deluxe Pack: ex expansion, this essentially means your new cards are likely a bunch you already have
By returning a beast-type XYZ monster you control from the field to the extra deck, you can special summon level 2 or lower beast type monsters (AKA Melffys) to your side of the field, up to the number of XYZ materials the returned monster had
to handle these when playing without sleeves, three in every four booster packs include a checklist card instead of basic land