Cekpem
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It seems like someone already wrote about this skill, but just in case, I'll write about it again:
RC14 Beta 6. The Guardian Angel perk adds an additional 7th-level creature earlier than level 20 (definitely at level 19).
Witch huts offer a skill, although both of the suggested skills are already expert-level (previously, it just said that they had nothing to offer). And with the second hero, without these skills, after confirmation, the skill is not added. And after that, it's the same in all witch huts encountered on the map.