User blog comment:GreenMoriyama/Oonoki, the Heavy Wrestler/@comment-9155327-20160416010714/@comment-7481207-20160416094400

His passive would have not effect on Thresh's lantern, Bard's journey or Tahm Hanch's ult/W as none of those are effects.

Speaking off his passive, that reduction cap would require to reach, which i believe is something only Sion is capable of pulling off.