Guinsoo's Rageblade

+30 Attack Damage
+40 Ability Power

UNIQUE Passive: Basic attacks grant +8% Attack Speed, +3 Attack Damage, and +4 Ability Power for 5 seconds (stacks up to 8 times, melee attacks grant 2 stacks). While you have 8 stacks, gain Guinsoo's Rage.

Guinsoo's Rage: Basic attacks deal bonus magic damage on hit equal to 20 + 15% of bonus Attack Damage and 7.5% of Ability Power to the target and nearby enemy units.