Beast Tamer of the Arena

When Beast Tamer of the Arena enters the battlefield, create a 3/3 green Beast creature
token with trample.
You may cast creature cards from your hand for {3} and they enters the battlefield face down as a
2/2 creature.
Whenever you turn a creature face up, put a
trample or vigilance counter onto it as well as a
+1/+1 counter.