Players do not win the game, they can only lose by making a game play error (missed trigger, game rule violation, etc.) or by breaking a Judge Tower rule. Effects that say "you win the game", "you lose the game', "you can't win the game" or you can't lose the game" are ignored.
Players share a library. Cards are owned by the first player to have it enter their hand, battlefield, exile zone, or to be put on the stack.. Players still have their own hand, battlefield, and graveyard.
Players have infinite life and infinite mana of all colors and types.
Players must cast all spells and as soon as they possibly can.
Players must activate all abilities once per turn as soon as they possibly can.
Players must activate abilities on a card from the bottom up.
If an effect says "may", you must.
If an effect says "up to", you must choose the highest legal value.
All creatures must attack and block each turn if legally allowed to do so.
At the start of the game, players draw a number of cards equal to their judge level.