Attacking the nest

Heading off to the nest, everyone made sure they were clean and healed, masking their scents as they went in, seeing how the cave tried to be hidden but once inside it had a clumsily made and fake sigil that looked like an official seal far away. It was obvious this was an unofficial goblin cave created by a runaway goblin who merely wanted race type, a weaker version of job titles and an even weaker version of Joseph's class and species bar. With the reason it's inferior is that it is based on changeable classes depending on the desire, related skills, and horde numbers, whereas normal classes depend on what has been unlocked through accomplishments and what the adventurer could handle at their current level. Goblin classes are superficial and require a goblin's magic energy in their brains to focus on the class the goblin wants to become and then works by going at it like acupuncture needles. This only works on lower-tier classes while higher-tier classes require a following of goblins so their envy, greed, and lust can channel to the goblin they are collectively yearning to overthrow, upgrading that goblin's class.

In goblin bases, it is different since goblins have to listen to the laws set up and contain their desires, slowly gaining a cultural identity and appreciation for heritage. The ones who can't adapt are forcibly re-educated and killed if they fail to change, or they run away to create their own base, carrying a lot of risk. The goblin who went off this time was lucky enough to take over the tentacle monster nest which had been abandoned, breaking open the small holes where over-populated tentacle monster pits spewed them out from, turning them into barracks or store rooms. Joseph felt nostalgic and gleeful that he knew the terrain, leading the way into the cave and sending them to the secret attack points simultaneously. By the time they entered the boss room, the entire nest was snuffed out and all the Goblin Chief had prepared was now lost, allowing the adventurers to escape if they needed to. But that angry weakness didn't matter because everyone was so overwhelmingly strong that the Goblin Chieftain wondered how goblins were even allowed to create bases if low-ranking adventurers were this strong, not knowing they were the exception. But even if the Goblin Chief didn't know, Joseph knew what the Goblin Chieftain was thinking before he died and in his youth, using his ability to eat memories on top of genetics.

But that is when Joseph realised he had made a mistake because while going through the illegal base, he forgot to consider the aforementioned slimes, looking around but checking the ceiling, worrying if this was the last moment of Joseph's life or if he could save his comrades before they melted, hopefully creating an anti-slime acid coating in time. Thankfully though, Joseph was saved by Trap, the copy Merda made after a mimic chest somehow tricked her while in her training area, trying to escape and counterattack but mixing up her body's reactions due to the new slime ability. Instead of enhancing herself or shoving out a copy, Merda accidentally blooded her copy which was also in a panicked state, causing it to merge with the chest and take on the memories of both lives, creating two new people, Merda and Trap who each have their own slime clone ability.

Trap: https://rule34.xxx/index.php?page=post&s=view&id=11007842

Trap then spent the next minute explaining this, cuddling up to Joseph's arm while it created a slime mouth to blow him off secretly, taking the sperm right into her new mouth. They then went to the guild and registered Trap as a new adventurer under their party, deciding to also merge the two parties into the Lovers party. But immediately after they snuck off and the girls began having sex with Dinny and Matt while Joseph got Trap all to himself, trying out her slime clone ability and cumming in her like the image. Joseph then was watching as the slime copies quickly got pregnant and released humanoid slimes, getting Joseph a wicked idea as he sent one over to Candy, knowing she could probably use the help since all she's got is tentacle monsters and tentacle monsters controlling monsters.