Winning: You win by taking all 6 of your Prize cards, or if your opponent runs out of Pokmon in play, or if your opponent must draw from an empty deck at the start of their turn.
Lord Windgrace Lord Windgrace is simply great value for five mana
As Tsareena is weak to Steel-type attacks , which arent as present in the meta as other types, Tsareena will have a lot of chances to deplete the HP of the biggest threats of your opponents deck until it gets defeated
Or how about you play Barroom Brawl and give everyone the opportunity to join the fight
Amulet Bloom, Bogles, etc.), then Leyline is outstanding and probably game-ending
So thats why a card like that is in the deck, that doesnt really fit the theme of the deck