Minecraft wiki entry for ED, associated text: Entity data
Tags common to all entities[show]
Tags common to all mobs[show]
 DragonPhase: A number indicating the dragon's current state. Valid values are: 0=circling, 1=strafing (preparing to shoot a fireball), 2=flying to the portal to land (part of transition to landed state), 3=landing on the portal (part of transition to landed state), 4=taking off from the portal (part of transition out of landed state), 5=landed, performing breath attack, 6=landed, looking for a player for breath attack, 7=landed, roar before beginning breath attack, 8=charging player, 9=flying to portal to die, 10=hovering with no AI (default when using the /summon command).