User blog comment:Kaido King of the Beasts/How Do You Kill Quincy Jesus? Part 2/@comment-26091912-20160418072244/@comment-3423279-20160418072720

Or the Hogyoku.

Maybe turning him to dust with Barragan's Respira would work.. or Yamamoto's Bankai just burning him out of existence.

It is possible that not fearing him would work if his "the thoughts of the masses gives me power" thing is what his power actually is, the way I interpreted it was whenever his opponent fears something he gains strength.

Get me Batman and Scarecrow from DC Comics, or a mindless creature that feels no fear like Doomsday.