This looks like a white card to me. But searching, it seems black does this much more than white: Defeat, Swat, Reave Soul, Dimir Charm, Silumgar Assassin, Killing Glare, Complete Disregard. There is a little of it in white as well, but Last Breath is the only one that isn't restricted to attacking or blocking creatures. And there's also Warping Wail.

­Defeat vs Reave Soul is particularly interesting, suggesting that Defeat is a little weak, so making it instant-speed is a fine way to make up for that.

Not sure why this is uncommon though.

Is this that much better than Reave Soul that it deserves a bump down in power and a bump up in rarity?

Alex, this isn't really what white should be doing. Just because white has gotten cards like this before doesn't mean it should be getting them. I'm firmly in the camp that white's answers need to be addressing a 'crime' - dealing damage, attacking, and blocking are 'crimes', but I don't think just having a certain power is a 'crime'.

That's just me, though. It does seem that white is going to be able to punish 'big things' preemptively. Still, no matter what, I don't think white should be able to punish things for being small.

It really could be common or uncommon to our tastes. Like doom blade. Constructed viable removal tends to be higher rarities, but I can totally see this being a common.

The question I was asking was was this that much better than Defeat that it deserved the bump in rarity. At the time, I said yes.

That said, until we are looking to find space in or cut cards from the skeleton, I don't think we really want to toy with the rarities too much.

I agree that this probably isn't (or shouldn't be) actually in white's colour pie. It's much more white to punish something for being big and scary (Reprisal, Smite the Monstrous etc).

But I agree rarity can be adjusted based on the needs of the skeleton. I'd prefer if the uncommon version wasn't literally just this text box - this looks like a common card's text box - but that may be just me.

BTW, I think the flavour is great for the set, "silence dissent" with this ability.

And I agree, this sort of simple removal is all over the map in terms of cost and rarity. It would be nice if an uncommon card were more interesting than this, but I wouldn't try to do that now, I'd wait and see if this card ends up as common or uncommon, it could easily be common, and if not, you could probably find a simple rider that fits the flavour.

This can be common in my opinion. Defeat is not a strong card.

As for if it fits the set at common thats a different developmental question that won't be answered for quite a while.