Księga Czarodzieja (Book of the Sorcerer) - a Polish mod that adds factions.

Review of the "Wizard's Book" mod: https://youtu.be/qYYrAP4sgd4?t=763

It's not some random creature, but the Spirit of the Wind, the Spirit of the Storm, and the Spirit of the Breeze. I couldn't watch any further, it was too much.