I wonder, since DY wasn't always known by that name, Toland has extensive disturbing knowledge of the darkness and hive magic (like was used in thorn) And nobody knows what happened to him.
It's a Hail Mary, but I'm not sure there is evidence to the contrary.
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No. Dredge Yor was a hunter. His attitude gave it away. Plus, Toland was lost AFTER Dredge Yor died to Shin Malphur. He was on Luna with Eris Morn when they went to destroy Crota, but failed. Nobody does know what happened to him, but he made Bad Juju, not thorn.