Temple of Cocidius: A Monster Girl Harem Adventure Serial: Book 4

Bargains With Gods & Monsters... 

With the garden breached and his identity revealed, Lir must fight harder and faster than ever to defeat the Temple of Cocidius and save his sister.

Lysperia awaits as his seventh trial, a realm known as the Gateway of the Fallen Champions, where death is an honor and crowds abandon their homeworlds to become eternal spectators. In the games of Lysperia's grand arena a goddess seeks her consort, but Lir quickly discovers that magic twists everything inside the coliseum. It pits ally against ally and works to keep the Artifact beyond his reach. 

Winning the arena may be a punishment all its own; in defeating Lysperia's curse Lir risks igniting Mordenn's wrath beyond anything so far, with his Artifacts in the balance.
 
To have any hope of surviving the Gateway and the god of death, Lir must rely on an assassin who wants him dead and a thief who wants Lir's prized possession for reasons that aren't quite clear. 
Two trials remain, and the clock is ticking louder than ever...

Temple of Cocidius is not for readers who suffer from an aversion to intense depictions of blood, gore, and daring men getting down with beautiful monster girls. If you suffer from any of these, you should talk with your doctor about whether Cocidius is right for you. 
Seriously, it's grown-up stuff.