Physical Double

Trap

You can only activate this card during your opponent's turn. Select 1 monster on your opponent's side of the field and Special Summon 1 "Mirage Token" in face-up Attack or Defense Position on your side of the field. The "Mirage Token" has the same Level, Type, Attribute, ATK, and DEF as the selected monster. Destroy the "Mirage Token" at the end of the turn.

Pros - Good defense against one attacking monster.
Good tool to copy a strong monster and suicide into it.
Can be Mystic Wok bait.
It is very annoying to your opponent

Cons - If your opponent has more than one monster, this card isn't too great.
Can't be used in the Damage step.
Not a 100% sure way to kill a monster.

Overall, this card is not so great, but in the right situations, it can be pretty nasty.

Problem with most of the pros...

You can only activate this card during your opponent's turn. Select 1 monster on your opponent's side of the field and Special Summon 1 "Mirage Token" in face-up Attack or Defense Position on your side of the field. The "Mirage Token" has the same Level, Type, Attribute, ATK, and DEF as the selected monster. Destroy the "Mirage Token" at the end of the turn.

So you can't really do anything with it on your own turn (most of the pros can only be done on your turn mostly)...best thing I can see with it is either a...less-than-satisfactory stall for the turn OR using it with Ultimate Offering and Tribute it to Tribute Summon a 1 Tribute monster.

Well, just copy their biggest monster. Sometimes their biggest monster is also the one they want to keep, so in order to get rid of the Mirage Token, they either suicide with the copied monster, or just end turn and let the Mirage die, giving you one turn of stall.

I suppose it could be good to use something like Mystic Wok or Enemy Controller.

Give them Lava Golem, then Double it, and right before the end of the turn, activate something like Spiritual Fire Art-Kurenai to smack em with more damage (or Mystik Wok) to cushion yourself.

Combo it with Taunt, Staunch Defender, and such. Chain it to their Creature Swap and make them wince.

There are all sorts of combos with this card beyond mere defence. Its fun and totally unexpected.

If you want a one turn stall...just use Waboku, Threatening Roar, Thunder of Ruler, etc...