In the mod - Capaloptocus/wordsofradiancemod GitHub Wiki

When a player visits the End for the first time, a structure will generate there - a circle of stone, with a ring of nine swords planted face-down in it. These are the Honourblades.

Each Honourblade grants surges mimicking those of an order of the Knights Radiant. One such order, the Bondsmiths, are... unique, and aren't supported in this mod (and similarly, aren't supported in the RPG). However, in order to include Taln's Honourblade in the mod, it will generate in this circle.

Basically, the circle of swords has all of the Honourblades supported in this mod. Canonically, Taln's blade shouldn't be there, and Ishar's (the Bondsmith Herald) should, but there you go.

To use an Honourblade, right-click while holding it to bond with the blade. It may then be summoned and dismissed at will. For as long as you are bonded to the Honourblade, it will grant access to two Surges. At any time, you may break your bond with the Honourblade by right-clicking with it (make sure to turn off any active surges first!). An unbonded Honourblade may be driven into stone and left at any point, by right-clicking with the sword on any stone.