(Making a deal with a demon is like paying an insurance policy with a hefty price (in this case, soul) and breaking the reliquary is compared to revoking said policy? She is starting to realize that this is probably how he got that his soul tied into that reliquary back home.)

Hm it now makes a lot of sense now. So that demon probably wasn’t that absurdly powerful but still has enough power to forge deals like it on a weaker scale. Never thought that he was secretly working for a minor level demon all this entire time. And I didn’t know that revoked deals can be a nightmare for the demon who made the deal in the first place.