Avatar of Light (Interworld Network Book #2): LitRPG Series

Sergei managed to lay his hands on the Divine Avatar of Savior which brings with it the kinds of new abilities other players can only dream of. Still, it's not the right moment to relax and go with the flow. Two of his friends have been captured; the third one is being kept hostage while Sergei is forced to procure the Elixir of Power.

And just to add insult to injury, Sergei is on the radar of Morbian, one of the four Horsemen of the Apocalypse. And their future meeting doesn't bode well for Sergei...