Marley, Arbiter of Age

As long as "Marley, Arbiter of Age" is on the field, his converted mana cost is {3}.

{b}{b}, {t}: Choose a creature and put a -1/-1 counter on it. Afterwards, put as many +1/+1 counter on "Marley, Arbiter of Age" as the chosen creature has -1/-1 counter on it.