You know what makes this whole thing even dumber? Imu, logically, shouldn't have even had his power during the Big War. Because if the other kings knew he had the literal Satan fruit and noticed he doesn't age while they do, and they actually trusted he wouldn't usurp the WG, that requires a suspension of disbelief bigger then the Grand Canyon.
So, supposing, after the VC, he stole it and killed the last few kings...then Imu, logically, probably has actually barely *used* the power in a fight since he hasn't had one in centuries. So how is he so good with it then?