Sela's sword is Lysraseri, the Light's Rage.

Sela's sword is Lysraseri, the Light's Rage. The origin revealed in #93 ties it directly to the Book of Myst. When the High Council wanted the remaining portals destroyed, Nissa needed a weapon capable of destroying the book. One sword wasn't enough. She combined four of the most powerful swords into a single weapon. Those four are Excalibur, the Japanese blade called Ame-no-Murakumo and Kusanagi in the issue, Mistilteinn, and Chrysaor. Nissa concealed the weapon's origins and abilities because she feared the Horde discovering what it was. Ordella eventually reveals that history and unlocks the powers Sela hasn't been using. So the different stones in its hilt have a specific meaning. Each represents one of the original swords and the ability it contributes. Lysraseri belongs on the list as a combined artifact, and the four blades belong here as its history. They aren't five separate swords all sitting in Sela's collection.