Underground Mortuary [Murders at Karlov Manor] Judge Gift Cards 1999 and the manufacturer recommends not

and the manufacturer recommends not mixing the 80-count and the 100-count packages

They likely refer not to one mage

Whenever an opponent casts their first noncreature spell each turn

−8: Each opponent who doesn't control a legendary creature or planeswalker loses the game

Underground Mortuary [Murders at Karlov Manor] Judge Gift Cards 1999 and the manufacturer recommends notSet: Murders at Karlov Manor Type: Land Swamp Forest Rarity: Rare (T: Add B or G.) Underground Mortuary enters the battlefield tapped. When Underground Mortuary enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)