Mirror Gate

Edison Card Text
Activate only when your opponent's monster declares an attack targeting a face-up "Elemental Hero " monster you control. Switch control of the opponent's attacking monster with the targeted monster you control, then calculate damage. Control of those monsters switches back during the End Phase of this turn.
Tactical Evolution • 2007-08-15
No targeting
No Damage Step effect
Banlist • Unlimited
Interactions
After Mirror Gate swaps the battling monsters, do you keep the opponent's monster permanently?!
Mirror Gate resolves during a battle and switches control of the two battling monsters.
Yes. The control switch is permanent unless another effect changes control later.
Rulings
edisonformat.net
●This card does not target.
●If your Elemental Hero monster is in Defense Position, calculate damage as normal, using its DEF.
●If you activate Mirror Gate, Damage Calculation is resolved as part of the resolution of Mirror Gate's effect. You can't activate cards or effects that could usually be activated during the Damage Step.
●If the attacking monster or the attack target is removed from the field by an effect chained to Mirror Gate, Mirror Gate resolves without effect.
edisonformat.com
This card does not target.
If your "Elemental Hero" monster is in Defense Position, calculate damage as normal, using its DEF.
If you activate "Mirror Gate", Damage Calculation is resolved as part of the resolution of "Mirror Gate's" effect. You cannot activate cards or effects that could usually be activated during the Damage Step.
If the attacking monster or the attack target is removed from the field by an effect chained to "Mirror Gate", "Mirror Gate" resolves without effect.