Welcome to the game. Congrats on reaching Gold 3. Keep playing, learning techniques, battle combinations. Goblin Mech is annoying to face in the lower leagues. Sea Monster comes with 8 life and heal, when combined with Crustacean King it stands a chance against the Mech long enough for some back-row magic to be dished out. Keep playing, and thanks for your thoughts. Good luck on the chance to win a card.