Here's the SEED of the Children of Danu - AC Valhalla
Assassin's Creed Valhalla > Children of Danu
Where is The Seed?
Children of Danu
Clue 1
Is given by Azar (Story driven)
"Investigate Movilla Abbey on the upper bay of Ulster's eastern peninsula"
The Clue is on a bench in the church.
The Seed Location
He commands Dunseverick fortress along the sea cliffs on the northmost tip of Ulster.
You can mark and defeat him now.