2 items: Adds 129 Damage
3 items: Gain Minor Slayer at all times, increasing your damage done to Dungeon, Trial, and Arena Monsters by 5%.
4 items: Adds 657 Critical
5 items: When an enemy you recently damaged dies, they leave behind a vengeful soul for 6 seconds. You can only create one vengeful soul at a time. Touching the soul increases your Critical by 2160 and your Critical Damage by 12% for 30 seconds.