Flashing custom rom

• Reboot to bootloader adb reboot bootloader
• Flash the recovery fastboot flash recovery <path to recovery file>
• Reboot to the recovery fastboot reboot recovery
• Go to advanced Wipe and Advanced Wipe
• Clean the following
  • Dalvik / ART Cache
  • Data
  • Cache
• Go to Install
  • Select Firmware
  • Tap Add more Zips
  • Select Custom ROM
  • Tap Add more Zips
  • Select Magisk
• Swipe Swipe to confirm Flash
• Go to Home -> Wipe -> Format Data
• Type Yes and continue
• Tap Reboot System