Rimuru Back 100 years

in the void we could see the strongest fighters of the cardinal world facing off against 2 dragons.
A firce battle considered as the fight among Gods(Capital G)
In the middle of this Chao's there is an angel named Feldway contemplating and regretting his decisions seeing how it all scalated he persuaded the remaining survivors to send rimuru back in time.
while this was happening he saw a glimpse of his master in rimuru making him want to serve him little did he know this wish will be granted later