A RWanitwt user defeats Signus, Envoy of the Devourer in Calamity Infernum Mode! :D 

They made Signus difficult but not Storm Weaver smh. :P
Tough fight, that one attack where it goes black and there is a trail of sword slashes tailing you I could never figure out how to consistently dodge. :PP
Music- • Terraria Calamity Mod ...