The Goblin did it, in the library, with the poisoned other half of Dragon Fodder!

Also kind of funny that this spell is going to result in a bunch of Goblins and Elves 'murdering' Angels and Dragons.

For flavor points, this should probably a more expensive spell that puts the perpetrator counter on any creature. That way, the second most powerful creature is the likely suspect for killing the most powerful creature. Name would probably need to be changed to infer jealousy. But... yeah... rather different card by the time you're done.

And usinfg the new 'a target is a target' tech, we can boil it down to:

Enchant murderer.
The murderer murders the target.
­: Target murders the murderer.

Wouldn't this be formatted better if it was just an aura the enchanted the perpetrator?

SecretInfiltrator's right you know.

That aside, I don't think granting this to other creatures gives you enough design space to justify a mechanic. You would get ones that would read generally better if they just read as "The next time target creature would be dealt damage this way, destroy it" and then those Mire Blight / Mortal Wound cards that are hardly exciting. Maybe some rare/mythic that gives it to all of your opponents' creatures.

I've seen this mechanic pop up in most custom card creation places and it hasn't never gone too far. One of the more recent ones were in No Goblins Allowed, though the name is quite telling: Useless Downside Mechanic - "Fragile"

@amuseum: You always say stuff like "what if sth didn't start with 1 toughness?" and "you think of drawbacks in the wrong way. you don't just have to print them on cards directly. abilities can also be granted onto others'/opponents' cards."

These are comments on the card you created. And it is a 1-toughness creature that has the drawback ability itself and doesn't grant it to opponents' cards.

Maybe there is a connection between what card you create to showcase the mechanic and what aspects of the mechanic people focus on in their evaluation.

With your example that you have chosen to communicate the idea of the mechanic, you tell us one thing: I want to use it as a printed ability of a 1-toughness creature right next to another drawback e. g. this.

That's like designing a crossbow that shoots the person pulling the trigger and telling people that they are all wrong about your intent, because it would be far cooler if it shot in the other direction.

because you think of drawbacks in the wrong way. you don't just have to print them on cards directly. abilities can also be granted onto others'/opponents' cards.

­Frozen Solid can be reworded as such: Enchanted creature has Fragility (any damage is enough to destroy it.)

Fragility says no matter how many +1/+1 counters, pump, equipment, you're still cursed.

You know where I wouldn't mind fragile? On a noncreature artifact. That would require that fragile also implies rules that automatically make any permanent with that keyword legal targets for "any target" damage spells, but that would be possible

This is a cool idea. It would still be a drawback-only mechanic though, so 'meh'.

I also think it might make the new 'any target' wording/rulings even more confusing so that might be something to take into account as well.

You know where I wouldn't mind fragile? On a noncreature artifact. That would require that fragile also implies rules that automatically make any permanent with that keyword legal targets for "any target" damage spells, but that would be possible - one of the benefit of keywords is that they can be hard-coded into the rules.

I will say, though, that I like Fragile much better on a one toughness creature. It says "Hey guys! It don't get much better than this!" Far better than putting it on a 3/4 and confusing everybody, which is what happened on GDS1/2.