Periwinkle, The Crown Prince

Vigilance
Whenever you tap an untapped creature an opponent controls, you may pay {1}.
If you do, choose one —
•Create a 4/4 white and blue dragon token with flying.
•Put a +1/+1 counter on each creature you control.
•Choose one creature you control, that creature gains double strike until the end of your turn.
Try not to make me frosty. You will not like when I get frosty.