Rise of the Devourer
Ongoing | | 2022 released
This is good but also strangely similar so far (up to chp 9) to He Who Fights With Monsters. Not the same but the more I think about it the more weird matches there are. I guess that's just the isekai genre for you. Similiarities -MC summoned into other world by a cult -summoners try to kill MC, the summoner's familiar tries to take revenge but gets killed -Quest system -MC saves girl with flame powers who was supposed to be sacrified and she is with the adventurer's guild and was only captured because she was betrayed -MCs have blood absorbtion powers and an instant short-range teleport (albeit Jason doesn't get his until later in the story)
The Mutual Non-Aggression Is Unpalatable