vigilance
lily bowen, raging grandma enters the battlefield with two +1/+1 counters on it.
at the beginning of your upkeep, double the number of +1/+1 counters on lily bowen if its power is 16 or less. otherwise, remove all but one +1/+1 counter from it, then you gain 1 life for each +1/+1 counter removed this way.