Coal, the Salivating

Coal, the Salivating's power and toughness are equal to the number of saliva counters on all opponents.
{4} Add a saliva counter to target opponent.
{w/b}{w/b}{w}{t} Remove saliva counter from target opponent: Target creature that opponent controls gets an affection counter. You gain control of all creatures with affection counters at the beginning of your upkeep.