mtg deck contains cards not in your collection Collektr | 🧙 ON AUCTION FROM RM7 on Collektr: Magic: The Gathering Yawgmoth's Will ⚡ Printed Urza's Saga (1998), Yawgmoth's Will is a true This ready MTG Mystery Booster playtest cards

Id slip it into a deck with some ways to recoup your life, and potentially ways to reset it by bouncing it, such as Master Transmuter, or blinking it, such as Teleportation Circle

Regarding card legality, the Cube designer defines what is or isnt allowed in the cube

This week in MTG news: Reality Fracture, Hobbit, Star Trek Previews

The best way to get a bunch of cards is by picking up a booster box

There are two starter decks available

There will also be microtransactions to enable the purchase of booster packs, but these will only include cards you could earn, as well as special graphical foils, meaning no-one will be getting an unfair advantage