Nektumar, the blightgrowth

menace, infect.
creatures with -1/-1 counters on them dont untap during their contollers untap steps unless that player pays {2} for that creature.
{4}{p/b}{p/g}{ut}: put a +1/+1 counter on Nektumar for each -1/-1 counter on creatures you dont control. activate this ability only once each turn. {t}: target creature gains infect until end of turn.