Venduli's Summoner

Venduli's Summoner can't be countered.
When Venduli's Summoner enters the battlefield, create a 1/1 red lizard creature token with haste,
a 3/3 green dinosaur creature token with
trample, and a 5/5 red dragon creature token
with flying.
Creature tokens you control have firststrike and
"When this creature is deals damage, put a +1/+1 counter on it."