I'm surprised no one commented on the less extreme things Tyrtoshi magisters have been doing, like hiring (or setting up) bandits to grusomely kill off any former slaves who dare abandon the plantations.
I thought that was this magister as well, if it's a more general thing then that need to be dealt with, but compared to this guys sheer evil it just feel less important.
So logic, in this case, applies differently to those we like or need than those we don't.
This is not logic, friend. This is called pathos. Please do not confused them.
How you did something matter as well as what you did, accidentally summoning a fiend with art involve little if any malice, accidentally summoning a fiend with torture and murder involve a load of malice, maliciously accidentally summoning a fiend, is a different crime from just accidentally summoning a fiend, he might not have expected a fiend to be born from his practices, but he was purposefully inflicting suffering on people, so his crime isn't accidental summoning, it's accidental summoning though pain and suffering, just like losing control and hitting someone with your car while drunk, is a worse crime than losing control and hitting someone with your car while sober, the end result is the same, but the fact that you were drunk driving, get you a higher sentence than if you had been sober.
If your crime summon something forbidden then it's a magic crime, if you summon it though art, though a non-malicious ritual going wrong, or though a failed attempt to summon something permitted, then the crime is accidental summoning, if you summon it though accidentally making a ritual by murdering and torturing, then it's murder torture and accidental summoning, accidental summoning mean you can be sentenced to sacrifice, it don't mean you have to be sentenced to sacrifice, it simply ups the maximum sentence you can receive to that.
So if accidental summoning is your only crime, then sacrifice is the absolute maximum punishment you can get, but most likely you wont get it, because the mitigating circumstances and lack of secondary crimes, mean you are very unlikely to receive the highest sentence the law allows.
But if you have accidental summoning, as well as torture, murder and slavery as your crimes, then you are likely to receive the maximum sentence the law allows, and accidental summoning ups the maximum sentence you can get, it don't do anything to the minimum sentence you can get, but it ups the maximum sentence from hanging to sacrifice.
Accidental summoning is a crime with a very wide divide between maximum and minimum sentences, depending on the circumstances, and whether this is your first time doing it, the punishment can go all the way from a fine, to execution by sacrifice.
Accidental summoning ups the maximum sentence you can get, it don't do anything to the minimum sentence you can get, it's a little like if a country only allow the death sentence for certain crimes, you aren't ensured that you will get the death sentence for one of those crimes, but there's a much bigger chance you will, if you have already been sentenced to 20 consecutive life sentences in prison before you committed the crime, than if you have never committed a crime before.
In the same way, this guy have committed enough crimes, that 1% of them would be enough to get him a death sentence, normally that would just end in overflow because he only has one life, but accidental sacrifice ups the maximum sentence he can receive, and the other 99% of his crime flows into this new gap, boosting him up to the new maximum sentence.