Oh?
Is it time for you to make
this thread once
again already?
How time does fly.
Anyhow, as this is a niche character, I shall put the information together once again. This dude has exactly one appearance in the MAX series wherein he and his Vikings job out Thor and the Avengers hard due to a blood curse put on them going out of control -
see here for Strange explaining it.
Strange then finds a way to get around the blood magic that powers them and
Thor and a bunch of rando Germans from history take them to pieces very easily. That's it, that's all his feats.
So H/P Doomsday is such that he could probably rock Thor pretty hard, given how he rocked non joke Darkseid and Superman with a Mother Box in the same story so, I imagine he beats the viking or evolves to somehow get around his blood magic. It's not like Harald has anything that can meaningfully hurt him.