summon heroes and villians

Story takes place in fantasy world named aria where loved different species and also demons and gods all different superspecies you can imagine . As usual demons destroying and occupying this world by force
and gods protect by summoning there hero from different world and timelines but in this story Mc also summon but not as a gods representative but as a demon representative named diablos.
Here mc is anti hero but has his own rules.
this is my first novel so please forgive me if I do silly mistakes...
and give review so I can improve. this story is gonna be good so sit tight and begin this journey with your Mc(diablos)