If my opponent moves into a battlefield and I use Zenith Blade in response, how does the interaction work? Are we both attackers? If might is equal, do both units get recalled?

Ruling: The opponent who moved first is the attacker in both showdowns. When Zenith Blade is used, your unit enters the opponent's open showdown as a defender. After that showdown ends, a new showdown immediately begins with your opponent still as attacker (since they were there first).

Sequence:

• Opponent moves unit into battlefield (becomes attacker)
• You use Zenith Blade to move your unit in (enters as defender in opponent's showdown)
• First showdown resolves
• New showdown immediately begins with opponent as attacker and your unit as defender

Nuances:

• In a tie, only attacker units are recalled (unless specific gear changes this)
• Defender units stay even if their player doesn't control the battlefield
• These rules may be subject to change in future versions