Sword of the Doppelganger

[PhantomRyu]

the equipped monster cannot attack directly while equipped to this card. once per turn, you can reveal 1 monster from your hand or deck; the equipped monster gains the effect(s) of the revealed monster, until the end phase. if this card is removed from the field, banish the equipped monster.

[Cosmo.]

This card is way too strong! You can target any monster and turn it into a Quasar, an Apoqliphort Towers, or a Lonefire for a turn. AND ALL FOR FREE! try to balance it out

[Trebuchet MS]

Weird rulings ensue when you call monsters that can absorb other monsters. Think Thousand-Eyes Restrict or Destiny HERO - Plasma. The fact that you can mimic any Forbidden monster also smashes up the concept of having a Forbidden list in the first place.

[PhantomRyu]

okay, I've changed it so that you have to have the card to use it.

[I Hate Snatch Steal]

It still needs work:

 

Perhaps limit it to monsters that can be normal summoned?

 

Here's why:

http://yugioh.wikia.com/wiki/Sky_Scourge_Norleras

 

and a few others

[cardffreakxx]

noo noo nooo, too powerful.  

 

The equipped monster cannot attack directly. Once per turn, you can discard 1 card, then reveal 1 effect monster from your hand; the equipped monster gains the effect(s) of the revealed monster, until the end phase. Any battle damage your opponent takes for the rest of the turn becomes 0. If this card is removed from the field, banish the equipped monster.

 

Revised effect is a little more fair, but still strong