2 items: Adds 657 Critical
3 items: Gain Minor Slayer at all times, increasing your damage done to Dungeon, Trial, and Arena Monsters by 5%.
4 items: Adds 129 Damage
5 items: Adds 657 Critical, Your Heavy Attacks deal an additional 900 damage. Enemies you damage with fully-charged Heavy Attacks are afflicted with Minor Vulnerability for 10 seconds, increasing their damage taken by 5%.