Then exile it.) The value of X is calculated only once, as The Final Days resolves
The Monty Python collaboration is sold as two secret lairs, one being various card types and another being themed on colorless cards
A lifelink creature cant damage a creature with protection from it, so its controller will not gain any life
Any enters-the-battlefield abilities of the copied creature will trigger when the token enters the battlefield
Stoneforge Mystic no longer finds Colossus Hammer (or anything else), Archon of Cruelty is just a big flier and no longer wins the game for Creativity decks, Primeval Titan cant tutor up lands and gets blocked by Elesh Norn, Mother of Machines for days, Omnaths landfall ability doesnt trigger - the list of popular decks and cards that Elesh Norn stops is surprisingly long
With that said, check out Sidequest: Card Collection (73 A), a card-drawing Enchantment card that then becomes a 4/4 Artifact card called Magicked Card (73 B)