The Bloodthirster

Gold 3500
Grants Attack Damage, Life Steal and Life Steal now overheals

+80 Attack Damage

UNIQUE Passive: +20% Life Steal
UNIQUE Passive: Your basic attacks can now overheal you. Excess life is stored as a shield that can block 50-350 damage, based on champion level.

This shield decays slowly if you haven't dealt or taken damage in the last 25 seconds.
Builds From

B. F. Sword Greatly increases Attack Damage 1300 Gold Long Sword Slightly increases Attack Damage 350 Gold Vampiric Scepter Basic attacks restore Health 550 Gold