Fierce PPTQ Opponent

You may not sideboard Fierce PPTQ Opponent in or out of your deck.
If you are in game 2 of the match Fierce
PPTQ Opponent has +1/+1.
If you are in game 3 of the match Fierce
PPTQ Opponent has +1+1 and when it enters
you may discard a card, then draw a card.