Abyss
Based on its successor to XenForo 1, Abyss still brings many of the same features to XenForo 2.
Features include a flat, modern design with a detailed and handcrafted interface design that is built into UI.X 2.

Abyss brings its look darker suitable for all forum and many different capabilities that allow you to change the image background, a node grid management system and much more was offered in version 1. XenForo
more Abyss features:

• Standard navigation and user bar, floating or fixed
• Flat and modern design
• Dozens of different search bars and navigation positions
• Collapsible nodes, sidebar, postbit and signatures
• Many types of category description types (tooltip, inline, or not at all)
• Different connection styles such as modal window, dropdown and drag
• Option to remove the actions of the page from the forum list (New messages and Post a new discussion thread buttons)
• Option to enable avatars based on Material Design color system
• Change the background image, manage the node grid and much more!