Guinsoo's Rageblade

+30 Attack Damage
+40 Ability Power

Passive: Basic attacks (on attack) and spell casts grant +4% Attack Speed and +4 Ability Power for 8 seconds (stacks up to 8 times).
UNIQUE Passive: Falling below 50% Health grants +20% Attack Speed, +10% Life Steal, and +10% Spell Vamp until out of combat (30 second cooldown).