Cool SFX, huh? :)
These "Word of Alignment" spells have some similarities to the Word of Faith spell of equal spell level: Their areas of effect are all Colossal, and they dispel summoned creatures. Beyond that, there's a number of differences:
Word of Faith:
• Only affects Hostile creatures.
• No Saving Throws, period.
• Stuns creatures for [Caster's Level / 2] rounds.
• ...unless they're 4 Hit Dice or lower, in which case it flat-out kills them.
• Only unsummons Hostile summons.
Holy Dictum of Blasphemous Chaos:
• Affects
any creature who isn't Lawful/Good/Chaotic/Evil,
including allies and the caster himself/herself/itself!
• No Saving Throws, except for the unsummoning effect, which can be avoided with a Will Save.
• Has various effects, depending on if the affected creature's Level is equal, 1 below, 5 below or 10 below that of the caster. Effects vary for each spell (ie. Word of Chaos can inflict Confusion, Blasphemy can reduce one's Strength by 2 to 12 points for 2 to 8 rounds, etc) and are cumulative (ie. a Level 14 Cleric blasting a Level 9 Blackguard with Holy Word would deafen, blind
and paralyze the Blackguard).
• ...except that any of the four spells will flat-out kill or destroy any creature with [Caster's Level -10] Levels/Hit Dice or lower.
• Unsummons
any creature whose Alignment doesn't match that of the spell (unless it aces the aforementioned Will Save).
So all in all, it looks like Word of Faith is the one to pick when in mixed parties, since your teammates might not think too highly of you blinding them and dispelling their pets. But it's a pretty static spell; whether you're Level 13 or Level 40, it's pretty much the exact same spell. The effects of the Word of Alignment spells are a bit more dynamic; an 8 Hit Dice medusa that might be blinded, deafened and paralyzed with a Level 13 Cleric's Dictum spell is going to be knocked completely
dead by the same spell if a Level 18 Cleric's casting it. So while Word of Faith can be a bit more damaging for mid-level casters, high-level casters might be served better by the Word of Alignment spells instead (particularly in those parties where everyone else shares your cleric's philosophical point of view).
Thoughts?
(As an aside, the only spell which didn't even make Corella's tailoring model wince was Blasphemy. Therefore, tailoring models are Neutral Evil. I
knew it! :D )