Batmite

Kindred - If you control another Bat creature,
when Batmite enters the battlefield you may
return a Bat creature with converted mana cost 3 or less to the battlefield tapped.
Whenever Batmite attacks, you may sacrifice a
Bat creature, if you do, put a +1/+1 counter on Batmite and it gains Flying until end of turn.
When Batmite dies create a 1/1 Black Bat creature token with Flying for every counter on it.