Mantle of Siroria is a light armor set. Dealing direct damage with a single target ability creates a ring of fire beneath you for 10 seconds. Standing in the ring grants 30 Spell Damage, this effect can stack up to 20 times for a total of 600 Spell Damage.
The 5-piece bonus grants you a stack of Siroria’s Boon for 5 seconds. Each increases your Spell Damage by 30, with 20 stacks max.
You can reach a total of 600 spell damage with this set. The 600 spell damage can also be amplified by percentage-based multipliers like the Major Sorcery 20% spell damage buff, etc. As long as you keep dealing damage and you can stand in the fire circle, you can keep this buff up 100% of the time, which makes it one of the strongest damage dealer sets at the moment.
The Mantle of Siroria comes in 2 versions, an imperfect and a perfect version. The perfect version is slightly stronger in terms of stats than the imperfect version. The 5-piece bonus does the same thing on both versions.
The Mantle of Siroria set is part of the Summerset Chapter. You can acquire the set in the Cloudrest Mini-Trial in Summerset. Each set item is bound on pickup. You can acquire light armor, weapons and jewelry of this set in the Welkynar motif style.