MiRyA
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The Chosen One of the Gods is similar to the Vessel of Elrath, from Freya's campaign... I don't remember exactly!
No, the Vessel of Elrath has a different icon and is located in a different place. There are 2 identical ones there.
I found it, it's "Favorite of the Gods" - All creatures in the hero's army are always under the effect of the "Divine Strength" spell (Isabelle from Ilia's campaign).