To join, type "/theabyss" and once you have joined the server, type /is create.
This gamemode has a large amount of new crafting recipes and additional features not in normal minecraft, so please make sure to check out the survival and the crafting guide shown in the links below. You can also access these guides with "/guide" or find the links through the NPCs at spawn.
CUSTOM RECIPES: https://bit.ly/3RzY6nH
Once you start, be very careful to not lose your lava as you will likely have to restart. With that, I wish you the best of luck and have fun!