Very positive reviews on Steam; this seems to be a historical low. I hope it is okay to post deeply discounted games when they reach historical lows on Grey market sites. I have purchased a few games from Instant Gaming over the past 3 months and never had issues. The game has a cheaper listing price on Kinguin put the additional 2 fees Kinguin/G2a tacks onto the listing price makes them dearer. There is no fee for Credit Cards on Instant Gaming and only a small fee on Paypal.
"In Spellcaster University, you take on the role of the director of a magic university in a colourful world of heroic fantasy. Build your school, manage your budget, recruit teachers. Will you turn it into a black magic academy, with the best professors of necromancy and demonology? Or a place in harmony with nature to train druids and shamans? Or why not train adventurous mages, offering them options to learn how to fight and be stealthy? But this will require surviving the ruthless attacks of the orc tribes and the controls of the education authorities."
This is a great game, highly recommend - especially for the price!