Fire Emblem: The Age of Legend
Hadran, which means “abomination,” is the crime of murdering a human to absorb their Aegir. This is generally considered the vilest of offenses and is universally punished with death. Killing in wars does not generally count, but this is one reason mercenaries are regarded with dislike and suspicion in some circles. It is also a reason cannibalism is taboo, since that would be one of the most obvious signs of trying to take in the dead man’s Aegir. Believers of Fundin fiercely decry hadran. Some heretics extend the definition of it to killing anything from plants to people to derive Aegir from it and insist that this should never be done (generally they eat fruits or other foods that can be taken without killing anything).
Accusations of hadran are very damaging to one’s reputation and so are sometimes used to discredit opponents, though they are considered serious slander if proven false and so are not commmon as petty insults.
The earliest known writing against hadran by that name is by Tollidarius (Ancient) and dates to 1A 1204 or so when that noble companion of Sekeriah said, “Feast not on the souls of men as you do the flesh of beasts, for this is hadran.”