Supply Train

Haste
Automaton (At the beginning of your end step, if you haven't activated one of its abilities this turn, put this card into your graveyard.)
{1}, {t}: Distribute two +1/+1 counters among any number of other creatures you control.
{x}, Sacrifice Supply Train: Distribute X +1/+1 counters among any number of other creatures
you control. Gain life equal to X.