I'm not actually convinced that the Denarian entropy curse is particularly more formidable than the one in BR sponsored by a Walker. The curse in DM didn't seem all *that* badass - the attempted strike before getting behind the wards was dangerous, but avoidable even exhausted and battered. It's primarily dangerous because it keeps trying if the first hit doesn't succeed, not because it hits overwhelmingly hard. The Walker's curse hits like a truck, but if it's avoided or redirected, that's it until the summoner can set up to cast it again.
That's a good point. I was thinking that it had to be more powerful because Harry could redirect the one in BR, but maybe not.
I was figuring it kept trying because it hadn't killed anyone, but if redirected it would be 'used up' since it actually killed someone (even though it was the wrong victim). But yeah, maybe there's more to it than that... especially since, as you point out, Nic is
way more competent than the cult in BR.
The Knights just seem to probably be overestimating it from dangerous to autokill because they don't know any countermagic other than to jump on the grenade.
Yeah that's kind of what I was wondering.
The curse itself might not seem all that badass, but it was turbocharged by the Shroud.
Oh sure, with the Shroud it's a whole other issue. I'm talking about when Shiro says the Noose allows Nicodemus to mandate "a death that cannot be avoided". There's just got to be some way to avoid/block/flat out resist it if you're powerful enough.
Now maybe it only works on mortals, keeping him from killing Uriel with it or anything totally ridiculous like that.
But the fact that Harry's wards can block it does mean it's limited; somebody good enough ought to be able to outright counterspell it, even if that level's above any current mortal wizard. (I'm sure Odin or Mab could.)