Last night, at the critical moment when the King of Sea Monsters lunged at him, Su Ming'an directly took out the divine artifact "Makeshift Bed."
Since it was already night, the moment he had it on his back, he entered the night phase and successfully escaped by falling asleep.
Of course, since it took some time to put the bed on his back, the aftermath of that claw still hit his chest. However, it wasn't a big deal; the wound just looked scary, but he could recover by pouring a Blood Bottle.
He had just completed the fourth level of the night instance, and at the moment of falling into the sea as the instance ended, he used the Teleportation Pocket Watch to reach Nailuo's side.
As for why he chose Nailuo, it was because he knew Nailuo would definitely not be on the front line. The Soul Hunter Department wouldn't send a lady with little Combat Power there. Had he chosen Noel or others, he might have wound up near the Sea Monsters instead.