Ragnarok ,in Norse myhtology,was a period of time that means the end of the old world and the beggining of the new one , gods and frost giants fought the final battle there and Fenrir ate the sun and then chewed Odin.
Vidar killed Fenrir and with this happened, Thor and Vidar will be the rulers of the new world but Thor died. It is not said if this already passed or is still going to come.
