
Originally Posted by
Gaethan_Tessula
I'll add my queue to the people who object to this statement. It seems by your signature that you later qualified it to "destroy," which is better because it allows for the antagonist to ruin the protagonist non-lethally and still qualify, but I'm still not sure this is true.
I'll admit I have personal reason for this. I am not a good writer, and my "writing" is running tabletop instead of any medium over which I have full creative control, but one of the antagonists I found most interesting to run required the cooperation of a PC and would have found it quite counterproductive to kill them. Long story short, the antagonist in question is an entity which once caused immense ruin to any land in which it roamed, offering powerful bargains that inevitably monkey-paw'd on those who took them up.
To mitigate its power, a Mage tricked it into entering a pact wherein its power would be greatly suppressed for the duration of the deal, then engineered her own death to leave the deal unfulfilled. This left the entity more on the level of "Needful Things" instead of "God-Hand," a situation it detests. Its one hope is that the wording of the pact that left it without dissolution in the case of death ALSO meant that the oath could be fulfilled by another Mage if they meet a stringent set of criteria. It spends the next few hundred years futilely trying to create such a successor to the bargain, leaving shattered small communities and lives in its wake.
Skip forward to the present day, and the PC's are a cabal whose lives (mostly unbeknownst to them) have been partially shaped by the knock-on effects of this thing's machinations. One of them meets the criteria it's looking for (ironically NOT because of its efforts). The creature knows this, and openly tries to befriend the cabal so that it can trick or persuade the PC in question to fulfill the old deal and free it. Meanwhile, it works against their interests from the shadows in order to make its frontal offers of assistance more enticing (and also because it needs to create its monkey-paw deals in order to feed on the resulting symbolism).
Until/unless the thing is freed from its oath, killing or otherwise removing the protagonists won't progress the story. At best, it allows the creature to draw a new jumbo cactpot ticket, pray the numbers all match, and hope that the next candidate is more pliable. And while immortal, its patience for its reduced stature has its limits, so it doesn't want to reroll the dice unless it really, really has to (like, if the party figures out a way to put an end to it more completely).
Perhaps this is, in fact, a fatally flawed concept for an antagonist, but I'd prefer to think any deficiencies result from my execution and not the foundation of the idea.