I find a lift down after the frog demon and light another bonfire which EXPLODES! Goddamnit shrubbery! It asks again what I'm going to do once I take the throne and indicates that Vendrick is nearby... in the Undead Crypt. Sigh. Again with the naming. The crypt is guarded by a variety of undead (no kidding), as well as relatives of Sellsword Luet - big guys using twin shields.
Having a party always makes it easier!
Fortunately Devotee Scarlett is down here and between the two of us we smash everything including the Nameless Usurper again (guess she really wanted to kill Vendrick). There's an interesting section with metal bells that when hit, ring loudly to summon evil spirits from standing coffins. It's cute that the minion type foes instinctively go for the bells but the solution is simple: destroy the coffins and the bells can ring all they like.
It's not all bad guys here though, the wight, Gravekeeper Agdayne is quite personable as long as you keep all light sources away from him. He even joins the party to fight a very familiar, towering mace knight. Heyyy isn't this the same guy the ugly siren summons? It takes a few attempts to learn his moves (more importantly the timing) but thanks to Agdayne's sacrifice Scarlett and I defeat him.
Mace guy has some sweet looking armor...
The chamber he was guarding holds Vendrick... the now hollow king. He isn't hostile though, so I am content to just nab his ring and get out of there.