This is not for Sam-sung or OOS stock roms! Know how to recover your device before using Subs, as I am not responsible for what you do with your device! I can only test on Nexus and Pixel devices, but this should work on any device with a custom AOSP ROM with support. Oreo 8.1 and choose Android Oreo 8-1 from the main roulette.

Supported Android
(6.0 and up)
Ice Cream Sandwich (4.0 – 4.0.4),Jelly Bean (4.1 – 4.3.1),KitKat (4.4 – 4.4.4),Lollipop (5.0 – 5.1.1),Marshmallow (6.0 – 6.0.1),Nougat (7.0 – 7.1.1),Oreo (8.0-8.1), Pie(9.0)

Download Dark Infusion Substratum Theme for N, O and Pie 19.9 APK Patched

Dark Infusion v19.9 P.apk