Altered Glossary
1.1.3 Collectible card Game
1.1.3.a Altered is a collectible card game: players do not play with cards from a common pool, but from their own collection.
1.1.3.b In order to play a game of Altered, each player needs a deck of Altered cards (not to be confused with the Deck zone during play).
1.1.3.c For the purpose of the rules, a player is the owner of the cards in their deck, regardless of legal ownership. Nothing in the game can change the owner of a card.