Seth reacted quickly to Adrian's sneak attack, barely able to spawn his crystal sword in time to block the sword strike. Part of Adrian's blade managed to lean forward however, and make a cut on Seth's stomach.
"Now we're getting somewhere," Seth growled as he stepped back. He looked at the newcomer brandishing his sword at him, commanding him to stop. Stupid children of the Big Three, always carrying themselves so nobly just because they were the children of Zeus, Poseidon, or Hades.
"Newcomer, this is none of your business."
Seth thrust his palm towards him, sending a wave of dark energy meant to knock the demigod away. He then turned his attention to Adrian.
"Where's that pride of yours now, Adrian?"
Seth slashed his sword at him even though he was several feet away. A slash of curved energy released itself from the sword, flying at Adrian's blind side. It would only provide concussive force, not cutting.