Blight Brokerage

Instill 1 (This enchantment enters the battlefield with a -1/-1 counter on it. Whenever a creature enters the battlefield, you may move any number of -1/-1 counters from this enchantment
onto it.)
At the beginning of each opponent's upkeep,
that player may remove a -1/-1 counter from a creature he or she controls. If he or she does,
put a -1/-1 counter on Blight Brokerage.