703.1. State-based actions are game actions that happen automatically whenever certain conditions are met. It is not possible to handle other effects until the state-based actions have been dealt with.
703.1a Abilities that wait for a specific condition are trigger abilities, not state-based actions.
703.2. State-based actions are checked throughout the game and are not controlled by any player.
703.3. The game always checks for any of the listed conditions for state-based actions, then performs all applicable state-based actions::simultaneously as a single event. If any state-based actions are performed as a result of a check, the check is repeated.
703.4. The state-based actions are as follows:
703.4a If a player was directly attacked while they had no shields and the attack wasn't redirected, that player loses the game.
703.4b If a player has no cards left in their deck, that player loses the game.
703.4c A creature that has power 0 or less is destroyed.
703.4d A creature that lost in a battle is destroyed as a result of the battle.
703.4e When the information of the linked God becomes inappropriate, the link goes away.
703.4f When God leaves the battle zone, only one of them leaves the battle zone.
703.4g Psychic Creatures and Draghearts put in zones other than the battle zone are put into the hyperspatial zone.
703.4h A Psychic or Dragheart cell by itself in the battle zone is returned to the hyperspatial zone.
703.4i When the top card of an Evolution Creature leaves the battle zone, the cards underneath it are reconstructed.
703.4j Cards in the battle zone that don't have a proper card type are put in the graveyard.
703.4k When a Command is put into the battle zone, the owner of that Command puts a seal that has the same civilization as that Command from the sealed card into their graveyard.
703.4l A Weapon by itself in the battle zone is returned to the Hyperspatial Zone.
703.4m When a fortified shield leaves the shield zone, the castle is put into its owner's graveyard. If the [Shield Trigger] ability of that shield is used, it is put in the graveyard immediately after use.
703.4n When another D2 Field is put into the battle zone, the D2 Field that was previously in the battle zone is put into it's owner's graveyard.