Originally Posted by
Troacctid
That pretty much only matters against balors and pit fiends. Like, exactly balors and pit fiends and nothing else in the Monster Manual, unless I'm misremembering, right? I mean, how many monsters actually have blasphemy? It seems like a very niche concern. And the fact that you have spell resistance means it's not really no-save, because you do get a roll to block it. You have the same chance of resisting a balor's blasphemy that a character with +13 to Fortitude has to resist its implosion, for example.