Alaris, the Snail King

When Alaris, the Snail King enters the
battlefield, create three 0/1 green Snail creature
tokens with "At the beginning of your upkeep,
put a +1/+1 counter on this creature."
At the beginning of your upkeep, put a +1/+1
counter on Alaris.
Each Snail you control has hexproof as long as
it has a +1/+1 counter on it.