Guinsoo's Rageblade

Unique – Wrath: Basic attacks deal 30 bonus magic damage on-hit.

Unique – Seething Strike: Basic attacks grant 8% bonus attack speed for 3 seconds, stacking up to 4 times for a total of 32% bonus attack speed. At maximum stacks, basic attacks on-attack also grant a Phantom stack for 6 seconds, up to 2 stacks. At 2 Phantom stacks, the next basic attack consumes all of those stacks on-attack to trigger a Phantom Hit that applies on-hit effects to the target after a 0.15 second delay.

Limited to 1 Guinsoo's Rageblade.