Help sm-t700 accidentaly deleted my os

I have a samsung galaxy tab s 8.4 (sm-t700) and yesterday it started having glitches with the screen like an old projector to where lines flash on and off the screen but then the screen would go blank so i would sleep it and wake it up and the screen would be back on but this kept happeneing so i tried doing a factory reset in the settings but it just forced a reboot so i went into twrp recovery and did a wipe there but accidentaly wiped clean everything and dont have any roms to flash anymore so i just rebooted into os and didnt see no os warning and it got stuck on the splash screen so right now the battery is dead