The dark way

The first arrow struck the goblin king in the neck. He rose, and tried to shout out a command, but all that issued forth from his mouth was a turrent of black blood.
The second bolt struck him solidly in the gut. He staggered and fell from his small dias with clatter, as his crown rolled from his head.
The rest of the goblins screeched and turned to face the party, which now spilled from their hiding place.
Nemon killed one with with a swift blow to the head. another went down to Gruffydd's hammer.
The rest of the goblins, terrified at this surprise attack, ran for the door. The sentry squeaked a warning, but to no avail. His brethren threw him aside and unbolted the door.
No sooner were they out the door, than a loud roar announced the arrival of the manticore. It tore threw the goblins with ease. Black blood splattered the walls.
"Now!", Gruffydd shouted, "while it's distracted".
rather than search the room as usual, the party took the chance to slip past the beast while it gorged on goblin flesh.
They raced down now familiar hallways and up unguarded steps, never looking back, for fear of seeing the manticore in pursuit. They decided to take the dark way, through the caves that emptied on the side of the river's ravine. Up ahead could be seen the last dying light of the day as it came through the open cave mouth.
But suddenly, the opening darkened. A large silhouette filled the opening. A figure barred their way.