BKSRO-BOT & Upgrade

what's the BKSRO-BOT and how to upgrade items from D13to14and15
when u wanna to upgrade ur item from D13 u must to plus it +10
and if u wanna to upgrade it to D15 moon ,,, u must to plus it up to +12
and if you wanna to make it D15 sun u must to up it upto +14