Towering Yeti

If X is 6 or more, Towering Yeti enters the battlefield with power and toughness each equal
to the number of snow lands you control.
If X is less than 6, Towering Yeti enters the battlefield with power and toughness each equal
to 3.
When Towering Yeti enters the battlefield with
power 6 or more, tap X target creatures you
don't control.