Whenever a creature enters the battlefield under your control, put a counter on Stand United.
Once there is 5 counters on Stand United, all creature you control have vigilance.
Once there is 10 counters on Stand United, all creature you control have first strike.
Once there is 15 counters on Stand United, all creature you control have lifelink.
Once there is 20 counters on Stand United, all creature you control have +1/+1 and indestructible.