We must destroy the machinery that is making these nexus-stalker aberrations possible. To strike at their proto-accelerator would be futile as it is an ethereal creation. We must instead destroy the manaforge energy tube that they are using as a conduit.
I have all that I need to create a device to overload the conduit save for one item. I need a wrapping from an archon or overlord that might be transforming soon in order to calibrate the device.