mtg phyrexia all will be one set booster box Magic The Gathering: One: Display Traditional Foil Borderless Mythic Planeswalker in 3% of boosters. Phyrexian All Will Be One

The short answer: anyone who wants a photo turned into a real, collectible card

I personally see having some mtg cards around as a way for me to remember the game if square ever turns it off

Hagneia Equip Artifact - Equipment Thief's Knife Job select (When this Equipment enters, create a 1/1 colorless Hero creature token, then attach this to it.) Equipped creature gets +1/+1, has "Whenever this creature deals combat damage to a player, draw a card," and is a Rogue in addition to its other types

In a Two-Headed Giant game, life gained by your teammate won't cause The Wind Crystal's second ability to apply, even though it will cause your team's life total to increase