CU15

Seems a bit bad compared to Inside Out.

...Oh! Wait, no, I completely misread this. This is giving my creature the P/T of your creature, and your creature the P/T of my creature, right?

OK, that's completely different. You might want to use a different phrasing to avoid people confusing it for the About Face/Twisted Image effect. Serene Master does this kind of thing, so maybe... "Choose target creature you control and target creature you don't control. Exchange those two creatures' power. Exchange those two creatures' toughness."

It is like Inside Out, switches your creature's power and toughness and that of one opponent's creature too. It supposed to be used in conjunction with the Feed creatures to make sure you get the kill while also possibly buffing your creatures. Basically About Face for 2 creatures. Maybe I will add draw a card to it too.

Does it need to be one of each? Maybe "Switch the power and toughness of up to two target creatures" or "Switch the power and toughness of up to two target creatures controlled by different players"? Except that's still ambiguous.

I want to see Alex's card made somewhere too :)

This wording is pretty ambiguous.

Is it really that ambiguous? It has the basic templating of "yada yada target creature you control and target creature you don't control" with the effect placed infront of it. It would need "exchange" or "with" to actually mean that you swap their p/t, as it is right now it can't really mean that. I would really like this to stay that way, since "up to two target creatures" could be really strong for just 1U.

Sorry, it really is ambiguous. This could either means "Take two creatures, they swap stats with each other" or "Two creatures both swap their power with their toughness".

Either are perfectly sensible and possibly interesting cards. Possibly somewhat too confusing as a combat trick - the existence of this makes working out blocking combinations really problematic.

Also, of course, if this exists in the second mode then you want to be sure a good 90% of the creatures in the set have non-square stats. And several ones that are worth using want to have very non-square ones. Not a problem, just another constraint on your later designs to be aware of.

Does "Clone and counter-clone" exist already? It seems like a very blue card that should.

It's ambiguous. I got it wrong on first read, too, and if you weren't the designer of the card, I probably would have tried to argue with you that you read the card wrong. Here's another possible suggestion for templating.

Temporary Curse
­
Instant
Switch the power and toughness of target creature you control until end of turn.
Switch the power and toughness of target creature you don't control until end of turn.

Oh wow, if this isn't meant to swap creature A's power for creature B's power then yes, the wording definitely wants to change. jmgariepy's wording is much more comprehensible.

Thanks for the feedback, had the same idea @jmgariepy, just as one sentence with "then" inbetween.

Switch the power and toughness of target creature you control until end of turn, then switch the power and toughness of target creature you don't control until end of turn.

What is better, 2 sentences or one run on sentence? Both ways take up about as much space on the card.

I think two sentences is cleaner. Gives the card more punch.

As a single sentence - I don't think adding 'then' changes the meaning.

"Then" should change it, it's a clear divider in MTG syntax. But it would not make sense to use it, cause there is no time restriction to any ability. Gonna make it 2 sentences.