Myr Machinator

Other construct creatures you control get +1/+1
{t}: Put a 1/1 construct creature token with "At the beginning of each End Step, if you don't control a card named Myr Machinator, sacrifice this creature." on the battlefield.
{3}: Construct creatures you control get +1/+1 until end of turn.
It doesn't care for making other Myr, unlike the rest of it's kind. It's artificial heart is in making his own original creation.