(2 items) Adds 1487 Spell Penetration
(3 items) Gain Minor Slayer at all times, increasing your damage done to Dungeon, Trial, and Arena Monsters by 5%.
(4 items) Adds 129 Spell Damage
(5 items) After completing a fully-charged Heavy Attack, you and up to 5 group members gain Major Slayer, increasing your damage done to Dungeon, Trial, and Arena Monsters by 10% for 1 second for every 600 Spell Damage or 6300 Magicka you have. Roaring Opportunist can only affect a target every 22 seconds.
Maximum duration 12 seconds.