This is just a theory basing off of the new vitality-based armor that was leaked to us in discord a few days back:
This is 100% the Oracle Armor since it has the blue aura at the back which is related to the color of the spirit in the game and there’s only one vitality-based armor that was added. Now as you can see, it isn’t exactly the type of armor fitted for CQC style like warrior and berserker and instead it’s closer to mage which has the zoning gimmick. Considering mages has the option to give shape to their attacks like animals and weapons, it wont be strange that spirit weapons can summon animals and weapons but instead spiritually. The catalyst for summoning could come in two types, grimoire or talisman, but considering the setting of the game, it is most likely going to use a grimoire.
Due to being a similar gimmick to mage, it may have something to give distance from the enemy with an example being crowd control like using spirits to get people stuck in one place or moving them from one place to another. Hell spirit weapons may even have a skill that opens a short portal for quick transportation since it counts as crowd control. Though then again this is just a theory.