Zybr
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Logically, it makes sense, I agree, but the issue is – how would creatures that live in water and don't venture beyond the deck of a ship or the coastline roam the land and capture other cities?
Considering the pentagram of magic schools, which has no free space, it suggests that the race should be non-magical (without a guild), but magic should be present in the form of abilities for the monsters (like the Mermaids, for example).
As for the magic school, besides tricks with illusions, temporal matter, and space, nothing else comes to mind.
Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!