He's supposed to transition to a new phase where he has a blue HP bar, but nothing is happening. Screenshot below.
EDIT: I used "defeat me" and reran the fight and it worked properly that time. There's still a bug lurking in there somewhere, though.
Harper Chronicles: Cap Snatchers (RELEASED) - NW-DPUTABC6X
Blood Magic (RELEASED) - NW-DUU2P7HCO
Children of the Fey (RELEASED) - NW-DKSSAPFPF
Buried Under Blacklake (WIP) - NW-DEDV2PAEP
The Redcap Rebels (WIP) - NW-DO23AFHFH
My Foundry playthrough channel:
https://www.youtube.com/user/Ruskaga/featured
Comments
When the bug hits, they don't phase as normal but go to zero HP and just do nothing.