So I like the new devourer even better than old Feral Flare, and here's why

If I can get my on'hit effects to proc twice, that will be amazing on the champs with whom I stack on-hit items. Especially Yi, WW, and Evelynn. Both Yi and Evelynn have a mechanic that already allows them to proc on-hits in rapid succession, so with this imagine an evelynn using her E to proc devourer, Wit's end, and BOTRK four times, before using BOTRK's active and her ult to nuke you in a single instant, high health or no. Or if Yi suddenly on his fourth hit does almost double the damage of his other hits with the same items, because why not? or imagine WW getting to late game and suddenly his passive is doubled. or if a braum jungle could proc his passive in two hits. Or a Cho'gath jungle procs his E twice(maybe) anyway, the implications are huge for meta and non-meta jungle builds.

Edit: So I didn't realize that it only has an extra proc every other attack. So its not the super OP item I had assumed at first, but still is damn good on a lot of champs. And I forgot about the champs like VI, Xin Xhao, and Aatrox, as I don't play them often, but its a very good point to mention that they will be good too. However, RIP AP Xin Xhao because they nerfed the AP ratio on the W heal.