I repeat: The New Laboratory quest can be completed from v0.410 on and is fully described in the walkthrough. No hints.
Copy pasted from the walkthrough:
New Laboratory It begins with a question to Melissa about her lab. After Crowley obtains the [Magic eye] (obtainable by completing the Lost Delivery quest), when he enters his cellar, he remembers that Melissa told him about using a powerful magical object as an anchor. He decides to saturate the "eye" with magic. In practice, this means transferring 999 units of mana from Crowley to the orb. There is no daily limit to the transfer, so if you have mana potions, you can speed up the process. When the sphere is fully saturated, select - Do this to perform the ritual linking the sphere with the lab (+200 EXP). Once bound, the orb can be used to reload +50 MP once per day. If you have learned the Return spell, Crowley can use a magic circle to teleport to multiple unblockable locations for 50 MP. Locations are unlocked when you first visit them (in old saves you need to use the cheat room). List of available locations: • Melissa's Room; • Elf Camp (the one with the spa); • Orcish camp (the one next to the elven forest); • Goblin Village (deep in the goblin caves); • In front of the ruined temple (the one with the Priestess). To further pass this quest you need to get a book [Secrets of space manipulation] (obtained during the quest "Melissa's Secret", if missed, in dunge, where the book lies, you can return at any time. Entrance to the dunge is in the basement of the tower). Go down to the basement of his house and use the book in the inventory in the "Key Items" tab. Calling Jimm and if he is not busy (the same random event where the demon fucks a demon in the ass +20 lust) then offers Sparring: • Defeat: Jimm says you have failed. You can try the next day. • Victory: Jimm praises Crowley for the victory and is removed (+1000 EXP). Next, our goal is to increase the maximum MP Crowley to 250 units, for this we will help: • [Sapphire ring], [Sea talisman] - Each of these accessories adds +20 to max MP • Summon Meryl and ask her to work with a pen or give a blowjob, which will give us +20 MP to the maximum, it takes 50 lust (Sex → Work with a pen or blowjob) • If the above methods do not help you, then you can only help raise the level. After that, go to the eye and when talking to him, click Expand Lab. After a short manipulation the basement turns into a beautiful room, similar to Melissa's room.
This is where the quest ends. After the quest, try to summon Meryl. She will hang out in your lab some days of the week (Tuesday afternoon/night and Sunday afternoon/evening).
