Stunned: Endurance roll to shake it off and get their brain back in order.

An ancient demon immune to mortal weapons turns out to be mostly just immune to Weapon:3 and below, not so much rocket launchers.

IIRC (from reading TV Tropes) that guy was immune to weapons forged by mortal man.

Rockets aren't forged.

 

Using the temporary powers rules, combined with debt from sponsored magic, sounds like an awesome idea.

Not sure how to price it - making it fully sponsored magic would kinda change the concept. Perhaps something like this:

Sponsored Power [-2 refresh]
The character can acquire debt in the same way as a sponsored practitioner. He can "borrow" up to one debt per die roll, as per sponsored magic.
Further, he can temporarily acquire powers, depending on the agenda of the sponsor. Each temporary power costs an amount of debt equal to it's refresh cost per scene, as per the temporary powers rules.

That right there is a big temptation. Especially when the sponsor can compel and escalate, using the debt. If you come out of a fight with 4 points of debt and only 2 fate left, you are likely to find yourself with someone's blood on you hands afterwards. Given the nature of the Sword, quite possibly someone innoncent. That would make it very dark though, very nasty and very tempting.

You could still keep the option to acquire permanent powers through it, with the aspect rules. IMO it shouldn't even cost any refresh, as it just mirrors the changeling template ability, that they do not pay any refresh for. In the long run it even makes sense to do it, you change your aspects, but get more powers that you have access to without getting debt.

That works for me!

In the fifth season, Spike explains to Buffy how he was able to kill two slayers. It comes down to slayers having a latent death wish; this is explained in detail in the relevant episode. So, I would propose the catch being Slayer's Death Wish, met by maneuvering a psychological aspect "Seduced by the Death Wish" into place and then invoking it for effect to bypass a slayer's Toughness and Recovery. Its worth would be: +0 for Toughness powers being good against anything but that, +2 for anyone potentially being able to evoke it, and +0 for pretty much having to know a slayer personally to figure it out in the first place.

Charles

Sounds doable- though if you're only taking one of Inhuman Toughness and Recovery, you're down to one point of refund as you're only spending two...

What Catch would you put on their Inhuman Toughness?

That's one way to do it- but it doesn't carry the risk of "no Refresh left, NPC'd!" that I was going for. OTOH, it keeps them in the game longer, having Hideous Consequences for longer... Yeah, I kinda like that.

Another idea I had, which I'd be interested to hear your thoughts on: allowing mid-scene buying of offensive stunts for the same sort of price, for when you really need Wall of Steel and it's worth paying for.

If all you have is Ritual: Ectomancy? Yeah, in a straight fight, you're not gonna be able to do much supernatural stuff. I'd say combat rituals aren't gonna work too well- too much risk of the enemy disrupting it.