Love Bug

When this card enters the battlefield, place two -1/-1 counters on it.
Whenever you deal combat damage, remove a counter from this card.
If this card has no -1/-1 counters on it, target opponent gains control of this card. This card gains Indestructable and "At the begining of the controllers, the controller of this card must put a
-1/-1 counter on a taret creature they control other than Love Bug"