User blog comment:Slashingstrike/Enchantment: Kritalizer/@comment-5035765-20160813053410/@comment-6726953-20160815163220

if this item makes all on-hits crit, then this item would probably make Bloodrazor (and maybe even warrior) much, much less picked.

I mean, Kindred loves bloodrazor but if their passive could crit for double damage I'd take this over that any day.

Slightly less attack speed for 30% crit, 5% movement speed and 30 on-hit magic damage is pretty gold efficient stats for a jungle enchant. Plus, having 5 passive stacks + BOTRK on a crit would be 24% current HP damage in a single auto, which would be very strong. This is without factoring in Infinity Edge's bonus crit damage.

I think this item would be strongest on Quinn, Yi, Twitch, and Kindred, since they already build (some) crit as it is. Regardless though, this item sounds like it would be broken on champions that have any synergy with on-hit effects.