Lucas' goal was to kill Neo.
It didn't matter if he did not do that with his own hands.
As long as he injured Neo and made him expend his Divine Energy, it was good enough.
Arthur's Shadow would do the rest of the job.
Neo, weakened, would be in a disadvantageous position if he fought against Arthur's Shadow.
He was tired and, although he blocked the attacks with Ocean's Embrace, some of them went past his defenses and injured him.
The portal disappeared.
Neo returned the sword to the sheathe and asked Obitus to reseal the blessing.
Lucas was likely returning to Depth Level 3.
Since he was injured, Neo could catch up to him if he pushed himself.
However, that was counterproductive.
It would give more time to Arthur's Shadow to revive, and Neo would be wasting more Divine Energy.
Neo turned around.
He moved towards the doorway of Depth Level 5.
…
Inner Castle, Depth Level 5