紧急着陆

During the first phase of the fight, the dragon will periodically rise up into the sky for a short time, then drop back down and protect itself with an ice shield. When the dragon is down to about 50% health or less, Pact forces will shoot it out of the sky. It will drop on the plateau and bounce west to the water, beginning the battle's second phase. Your goal is to stand in just the right spot so you are flattened by the dragon when it falls to the ground, before it bounces. The general location is slightly northeast of the icon on your mini map. If you are having trouble, try positioning yourself at the dragon's rear right foot before it is driven into the sky for the last time.

If you stand in the right place, you will be in the defeated state after being crushed. If you are knocked down instead, you are either in the wrong place or standing in the right spot before the first phase is over, i.e. when the dragon is dropping to the ground on its own initiative rather than when it is shot down. This location is at the first place you fight the dragon, not the second.