Honestly, not a hard game by any means. Yes, there's permadeath in the sense that once a party member gets too old, they die and are no longer in your party. However, that's where the "Descendants" part of the title comes in. You can have your party members have sex with each other and produce offspring that, when they mature, are now full fledged party members you can develop. Likewise, monsters can also breed with compatible party members to create the equivalent of monster-human hybrids. There's also the monster capture mechanic where, once caught with a Tame Collar, are now part of your team once the process is complete. Each iteration and generation also passes one passive skill of the male and one passive skill of the female depending as to what attributes they have, either by nature, being already born as a hybrid, passed down from the parents, etc. In a sense, you can breed your own party members and monsters to acquire certain stat ups and passives, but you won't get stronger solely on those. It's a by-the-books RPG game really in terms of grind, levels, and skills, no roguelite elements found here (afaik).