Antero had warned Lux through telepathy about Daniel's subordinates, who were waiting on the other side, so he prepared himself for a battle the moment they appeared on the Fourteenth Floor.
As soon as they passed through the portal, Lux and his subordinates lashed out and annihilated the observers before they could send a message to Daniel.
Even the Demigod who was assigned to monitor the situation hadn't managed to do anything before James' Silver Spear pierced it through the head, ending its life in a heartbeat.
Blackfire then devoured the Abyssal Creature's body, leaving no traces behind.
As for the corpses of the other monsters in the surroundings, the Liches in Asmodeus' group reanimated them all and added them to their Undead Army.