Spoiler
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Yea, Na-In was prev human who was sacrificed to Amon who is a dragon. Amon and Na-In are mates so Amon saves him from being gone forever by eating him so he can turn immortal (like he marinates him inside him r smthn to share his lifeforce/powers kinda thing). Amon doesnt give a shit about anyone or anything but Na-In to begin with but he really started to treat humans more harshly after the event.

Why does amon want na-in to be OK with humans being sacrificed and killed? Like did humans kill na-in once or are they required as a sacrifice to keep na-in alive or is it really just for funsies