Quote Originally Posted by The Glyphstone View Post
But does he even exist anymore, is what I'm saying. The Necrons beat up and imprisoned all of the C'tan millions of years before the Emperor ever existed, in the Newcron continuity.
The 5E Necron book does allow for C'tan shards having evaded the Necrons- could be four, could be four thousand, no-one knows for sure.

For the creature in Mechanicum to be a "shard" rather than a complete C'tan, does downgrade the Emperor's achievement somewhat- but not necessarily that much. Even the shards are pretty powerful.