Viral infection

Enchant target person at each of your upkeeps if
the person is still alive than create a 1/1 token
creature called virus with duplicate. At
each of your opponent's upkeep add -0/-1
counter on enchanted person.
Viruses cause familiar infectious diseases such as
the common cold, flu, and warts. They also cause
severe illnesses such as HIV/AIDS, smallpox, and
Ebola. Viruses are like hijackers. They invade
living, normal cells and use those cells to multiply
and produce other viru