OK. But I'm not sure that you have actually wiped your /system partition.
Before you do anything, in fastboot mode (the white screen with the mutli coloured writing on it), type the following in a command prompt from the fastboot folder/directory on your PC, then press enter:
fastboot erase cache
and if that does nothing
fastboot wipe cache
Then try to reboot by typing
and hit enter.
If that doesn't work, grab the toolkit I linked to and you'll want to
1. Unlock bootloader
2. Flash custom recovery (choose TWRP)
3. Sideload ROM from recovery and follow the relevant instructions in recovery (You'll need to download a ROM to your PC and place it in the relevant directory)
Never, ever conform