champion's path card sleeves Marvel Champions: The Game Core Set Compatible Sleeve Bundle (8801 X 1 + 8810 X 4) Champion’s Path booster packs—look for powerful cards such as Eldegoss V Marvel Champions Sleeves: Thor

Yes, it might be a four mana 2/2, but a decent body attached to a cheap and unconditional removal spell is a very efficient card

When your deck is very low on cards, you should be able to reliably launch four or five 'mons with every Splashing Panic

Career: FedExwith Tracking

Wizards confirmed that youre protected from opening duplicates, with a couple of caveats: If you open a rare or mythic rare Mystical Archive card that you already own a playset of, itll be replaced with another Mystical Archive card of the same rarity

It's so widespread at this point that all colors have a vast pool of cards with the mechanic, though