Fjorgyn: Insurrection. Fjorgyn LitRPG Series, #4

THE PRICE OF POWER IS EVERYTHING. In Fjorgyn, life is a game controlled by the System: a universal interface that manages every level, spell, and action. Michael Semione, pulled from his own reality at the time of his death, has risen as the System's champion. His quest is to unite the eight pieces of a divine regalia and confront the tyrannical High King Ankou Levent, whose thirst for power is absolute and unforgiving.
Alongside his chosen family-a warrior mother, an armored lover, and other allies-Michael must launch an impossible assault. But the closer he gets to facing Levent, the more he realizes the final piece of the regalia may be a terrifying trap. Can a man, yearning only for a quiet life, outlast his own destiny?