Hello, I really like your game! But I have a problem with the 4th floor of the dungeon. I still can't pass the mimic at the very beginning of the location, despite the fact that I have collected a new armor with a drill for the main character and a MithrilVirginKiller and Stillsto for the S'rami. Could you give any advice on how to defeat him?

Keep trying, What I would do is mostly use 'Poison' knife skill also a key to survival is using 'Cock Sucking' skill even though it's a Mimic, it works. You can regain some HP and it only cost  5 TP  each round.  Also S'rami 'thief' skill is quite useful to steal some Potions from certains enemies.