How it wins
Trades one card for one of theirs, again and again, until they run out of plays. Then whatever is left on your side wins the long game.
Key cards
Scapegoat
Metamorphosis
Thousand-Eyes Restrict
Tip
Use Scapegoat on their turn to block attacks. On your turn, Metamorphosis turns one sheep into Thousand-Eyes Restrict, which stops all other monsters attacking.