I copied needed files for quests in the quests directory, so now I can test them.
When I got the quest with a she-wolf, I choose to use 10 essence (that's a bit harsh !) to get just 3 ebenwolf.
When those ebenwolf are stacked with my sovereign they move sloooowly. If I unstack them, my sov animation speed is as usual. When my ebenwolves move their animation speed is slooooow.