Completed Mortal Shell.
The game is relatively short compared to Dark Souls: about one third of number of areas, bosses and overall length. Completed it in about 10 hours.
Seat of Infinity is the most tiring temple of the three. Even with the skill that gives you another respawn once you kill enough enemies, it’s a trial of endurance. I ended up running past most of the enemies to get to the boss.
The boss turned out to be the easiest out of the three for me. Maybe because my shell had a long reach and could shrug off some of the damage. Or I was well prepared, and not greedy. Or maybe I just got lucky. But I beat the “siamese twins” on my first attempt, and never looked back. Literally, I just ran all the way out of this cursed temple, not engaging a single enemy.
Final boss proved to be a real challenge for me. Mostly because he summons a lot of quick minions – true bane for my greatsword.
Managed to beat it on my last breath: