A creeping darkness

A creeping darkness begins to spill into Sanjo City and pulling all timelines into one, from ancient Rome to the future, former allies and enemies end up falling into the present and are forced to fight side by side to survive the creatures of the darkness. Can the former enemies and hero's call a truce and put the past behind them to survive or will everything go south for them resulting in horrible things.

GELLY IS NOT MY OC SHE BELONGS TO @Mauselet and @Thecrazyravenclaw