Eris Boreas Greyrat/Powers and Abilities

Sword God Swordsmanship
『Sword King』

Her skill is so great that when she first became Sword King, Gal Farion offered her the chance to challenge him to become Sword God an opportunity that not even Ghyslaine was given when she first became Sword King. Eris talent was so greatly recognized by Gal Farion that if Eris actually wished to, Gal Farion would have allowed her to become Sword Emperor by fighting Ghyslaine who was also a Sword King.

North God Swordsmanship
『North Saint』

Taught by Auber the North Emperor, Eris reached the rank of North Saint.

Magic
Beginner Magic

She reached beginner level magic after being taught by Rudeus. She can conjure fire, appeared to be used to burn Gal Farion after she defeated him.

Nameless Sword
A sword made by Yulian Jalisco that doesn't lose it's edge. Rudeus received it from Rowin Migurdia in Volume 3 as a thanks for telling him of Roxy's whereabouts which he then gives to Eris. The sword is a single edge falchion with a curved blade where the edge side is vastly wider than the back side and has two red ornaments on its blade ridge. The blade is also attached to both ends of the cross guard and has a knuckle bow. She fights with it using forward grip style and sheathes it horizontally behind her waist.

Phoenix Elegant Dragon Sword
Dragon Emperor made and gave this sword to the first Sword God. It has the ability to nullify, or weaken (e.g. for strong opponents such as Orsted), fighting spirit. Eris received it from Gal Farion, the current Sword God, in volume 16 as a gift for being titled Sword King.

Yubi Ori [Prominent]
Yubi Ori or Prominent is a sword made by Yulian Jalisco, one of the 48 demon swords. Rudeus received it from Orsted and passed it on to Eris in volume 17. It is worth about 100,000 Asura gold coins.