The Crystalline Amalgam

As long as you control three or more other snow permanents, The Crystalline Amalgam has "At
the beginning of your upkeep, you may pay any
amount of {s}. If you do, the next snow creature
that enters the battlefield under your control this
turn enters the battlefield with that many +1/+1 counters on it.
Cohort (You may have a cohort as long as it shares
a creature type and at least one color with your
commander.)