Guildgate Guardian

Vigilance, Lifelink
{g/w}{g/w}: Populate. (Create a token that's a copy of target creature token you control)
When Guildgate Guardian enters the battlefied,
you get an emblem with "Whenever a creature
enters the battlefield under your control, you may
put a conclave counter on this emblem.", and,
"When this emblem has five or more conclave counters
on it, you may sacrifice it and put a +1/+1 counter
on each creature you control."