The final campaign – “Even Angels Cry” [7th campaign – 1st mission].

I found all 4 pieces of the Moon Disc. Where can I find the Tear? I haven't captured the Fortress in the center, the gates to the city in the north are closed, and I haven't met Myhi yet.

The location of the Tear should have been revealed when you combined the four pieces of the disc. It looks like a regular artifact from which a beam of light emanates. My memory might be failing me, but the Tear was on one of the islands in the corners of the map, which can be reached through a portal.