The Dimension rift amulet in the Battle mode was something extraordinary.
It was extremely difficult to produce it, and the resources and knowledge required were vast.
For such a runic armament to have been brought to Jundra, it had to be one of the Elves' few trumps.
By activating it, two individuals, the user, and the designated target would be teleported to an isolated space that existed within the amulet.
Afterward, both would fight a life and death battle until the end. Only when a single individual was left behind would the Dimension rift: Battle mode amulet release the survivors, and the corpse of the defeated being outside its isolated space.
Nial was oblivious to the amulet's functions but he was smart enough to understand that the amulet was important and that Valvian's reaction to it was more than enough to give him a bit of reassurance.