How to win battle with 0 attack? - The power of onyx

Just when you think all hope is lost. It's not over yet untill it's over. Watch the battle where all my attacking monsters are dead. Onyx is the last survivor with no attack leading me to an impossible victory. The opponents could not kill him. Fatigue had to kick in to be decider and there was onyx the last one standing victorious.

Battle Link - https://splinterlands.com?p=battle&id=sl_e477b37d2a7ea3e8a3871c0f57a3aaa4&ref=maxpain00