Wormtongue was created for the express purpose of locking down primordial keepers, and one of its functions was to take advantage of the Memory of the Keeper that had been killed.
When the Memory arrived in the Great Desert, in that instant, it created a connection with the entire Primordial Keepers, because in this place, they were all connected.
The Aura of so many Soul Origin Orbs witnessed by the slain Keeper echoed throughout the Great Desert, and every Primordial Keeper in existence felt the throb of this power that should be in their care burning into their senses like a hot brand into their soul.
From the sands, countless Primordial Keepers began to arise, facing a single direction—the Memory of the slain Keeper, and with that connection, Rowan struck the blade of the Cherubim cutting into the Great Desert, opening the channel for Wormtongue to enter.
