Cycle of the artifaction

Sacrifice an artifact: Add .

Whenever another creature you control enters, put a +1/+1 counter on that creature and a +1/+1 counter on this creature.

Whenever an artifact is put into a graveyard from the battlefield, you may have target opponent lose 1 life.

This creature has flying as long as you control a blue creature. This creature has persist as long as you control a black creature. (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)