CraftTweaker: Dimensions - Shinoow/AbyssalCraft-Integration GitHub Wiki

There are multiple dimension-related things you can do through the integration as well.

mods.abyssalcraft.GatewayKey.addOverride(<dimId>, <type>);

Where: dimId and type are Integers, first one representing the ID of the dimension you want to add an override for, and the second represents which portal to create (0 = The Abyssal Wasteland, 1 = The Dreadlands, 2 = Omothol).

Example: mods.abyssalcraft.GatewayKey.addOverride(10, 2);

This adds a Gateway Key override for The Beneath (default dim ID for this dimension is 10), allowing you to place Omothol portals in there.