Originally posted by Halfdan:

4-5 stars... what mod are you using for that. 2 stars are max on any mob in game, even using consol command it shows 2 stars on mobs even its 20 :D

We were using this mod: https://valheim.thunderstore.io/package/Smoothbrain/CreatureLevelAndLootControl/

But beware, in default config everything can have up to five stars, including serpents, goblins, loxes and deathsquitoes ;)