This is essentially -Store TP 50. On any NM that actually used the TP counter to perform their special moves (there are many that can just do it whenever they want without TP) this would break them, especially if it lasted then entire fight. Cut the duration to the standard 3 min and the potency variable based on dINT. 50% is too high a cap on NMs for SE not to nerf the living sh!t out of it. Possibly 25 ~ 35% would be the most likely target, it slows down the NM enough to actually be somewhat useful while not disabling it or crippling it.
Thank you saevel for the perceptive. I appreciate it. I can see that the original spell's strength may have been on a one way trip to Nerfville. The potency of the TP gain loss I can agree with. It seems more realistic. Again, I appreciate it.

Pain is a great concept, but to be a plausible spell that they would implement I think that it would be a reduction in the computation of statistical modifiers for TP moves, not a flooring. Maybe go from -25% to -75% depending on dINT. Once more, it will have an effect on HNMs, but it won't be a "press button kill NM" type thing.
I appreciate the input. I wanted to see a spell that could reduce the strength of TP moves, though what to chose to modify in the damage formula that wouldn't break the game is always tricky. Thinking about what you said, your logic make sens, and I agree with it. It doesn't seem to break the game. Not to mention, whatever we can do the to the mob, we can receive ourselves (mobs being able to cast Pain... or worse, Painga on unsuspecting players). So, this wouldn't hurt players to badly either.

Heat sounds nifty, but it would have to be heavily nerfed if it was added to the game. They would probably make NMs would maybe take 10%, HNMs maybe 5% if that making the spell fairly useless.
Yeah... it is one of those "toy spells" that I wouldn't mind having. Actually reducing the damage down the targets receive may be a good idea. As I said above, anything RDMs can cast, enemies will be able to give (or give the area version... Heatga). I wouldn't want an Ukon WAR to get too much damage while under this ailment (or anybody else for that matter). In Abyssea it may not be so bad, but outside (like doing Voidwatch), I could be pretty bad.

But really, RDM needs more outside of the box thinking like this in order to be a productive job again.
I agree. I look forward to seeing more ideas and challenge what has been presented (like debating). I try my best to think outside the box. I really can't think inside of it, that is where I store my stuff.