>>536618319
serpents fang? conditionally speaking, of course. And the question mark is emphasized.

axiom arc maybe depending on your ult and/or state of the game. Opportunity can be alright depending on your mobility and more importantly your ability to exploit surgical strike maneuvers. Umbral glaive is neat if your support is trash and it's only 2500g like serpent's fang.

Voltaic used to be OP on Nilah for a short period last year when bottom and support could both use support items (in Nilah's case, it was blood song). I'm too stupid to know who Voltaic might even be a viable option for when it comes to ADC's.