This is a guide to hypercarry with adc's. I only show 3 adc but it works with almost all of them. The item build is the same for them all but you will only be able to solo baron with the full item build. Do not swap any of these for a defensive item in your full build, you can get one between each item but do not keep it. this is because with the lifesteal from Blade of The Ruined King and Bloodthirster is enough to sustain you if you keep auto attacking.

Pros- When you get this item build you can destroy enemy champions, no matter the health.
You can also solo baron if you focus on just auto attacking because then you get lifesteal proc and deal lots of damage.
Cons- Getting the entire build can be tedious and probably is only recommended if you're okay with drawn out games. But the payoff is amazing, so don't surrender!

You want to get the Bloodthirster first for lifesteal so you can sustain a little more. Then an Infinity edge for crit damage. Then the Runan's Hurricane for attack speed. Then a Blade of the Ruined King for all the lifesteal sustain you need which lets you avoid buying defensive items. Then a Phantom Dancer for movespeed, attack speed, and Crit chance. Finally you want ninja tabi, these let you sustain baron more. If you don't plan on or don't want to solo baron then get berserker's greaves.

Farm as much as you can to get the items you need. Take double golems or wolves (depending on blue or purple side) if you're jungler gives the okay or if you don't have one.(for PvP blind pick players)

Tell your team that your build is for late game and see if they are okay with that. Also tell your team if you are going to solo baron and if you got berserker's greaves, ask for help.