Cosmic Evolution is a newest Kodi Build for Leia 18 from One Nation Repository. It uses Aeon Nox skin and it has size of 186 MB.
The build has main sections for Movies, TV shows, Live TV, 4K/3D, Fitness, Sports, Paid Subs and fully loaded of most updated Kodi add-ons.
How to Install Cosmic Evolution Kodi 18 Leia Build
Step 1) From home screen go to the Gear icon (top-left corner) or Settings
Step 2) Click File Manager
Step 3) Click Add Source
Step 4) Click None
Step 5) Enter the following URL: http://www.onenation.info/
Step 6) Name it one nation
Step 7) Make sure all the boxes are filled and press OK
Step 8) Go back to Home screen and click add-ons
Step 9) Click the Box icon from the top left
Step 10) Click Install from zip file
Step 11) We’ll get a new window, here click: one nation
Step 12) Click Portal
Step 13) Click plugin.program.onenationportal-1.1.3.zip
Step 14) Wait for the notification in the top-right corner to popup, One Nation Portal Installed
Step 15) Click Continue
Step 16) Click Build Menu
Step 17) Click Cosmic Evolution
Step 18) Click Fresh Install or Standard Install (Fresh Install is usually bests)
Step 19) Click Continue
Step 20) It will download and install
Step 21) Click Force close
Step 22) After it installs restart Kodi and it should come up. Be sure to give it time to build menus and update add-ons.
How to change the Skin back to Default Estuary
If this Build does not work for you here is how to change the Skin back to default Estuary and remove it.
Step 1) From Home Screen go to Settings
Step 2) Click Interface Settings
Step 3) Click Skin 
Step 4) Click Estuary
Step 5) Click Yes
Read Here How To Remove a Build From Kodi Clearing Out Old Data
