Items are weird
... because mages are good for burst and CC, but need more CC to work in some cases.
... because we planned for all mages to have some CC, that's why we left Rylai's.
... because we still haven't figured out a good way to really counter health stacking.
... because ADCs rely on maxing cooldowns and casting rapidfire. (Doesn't everyone nowadays?)
... because what's better than mitigation? SHIELDS! (Now with added restorative properties!)
... because what's more fun that complete reliance on a single item!
... because we like you to think you can actually build this on anyone other than Teemo.
... because healing reduction helps counter Death's Dance's healing, not it's dps.
... because let's make an item go from on-hit to activated abilities!
... because supports need bonus heals.
... because supports need bonus shields.
... because supports are balanced around having a bunch of item actives instead of their kits.
... because need I say more?
... because why have an engaging defensive option when you can have a "NOPE" button.
... because bigger numbers mean dps can still be reduced, shielded against, or completely ignored.
... because why build Deathcap when this is more effective on average.
... because wards. (nah, just kidding, it's cause Teemo exists.)
... because mages needed another castable ability to amp their dps.
... because what is aim and focus.
... because let's create an item that counter anti-health items.