For GMs only.
I enjoy running Jade Regent for my players currently; we're still quite early in the game (just having finished the Brinemarsh). This thread is intended to collect neat ideas for the campaign from myself and others.
Most recently the climax was my players facing Tsutamu, the end-boss of the marsh, in his cave. He's a samurai skeletal champion; so although the rules don't really support it - I used his Resolve ability to heighten the intensity of the encounter.
A normal samurai can use resolve to:
Unstoppable: When the samurai is reduced to fewer than 0 hit points but not slain, he can spend one use of his resolve as an immediate action to instantly stabilize and remain conscious. He is staggered, but he does not fall unconscious and begin dying if he takes a standard action. He does fall unconscious if he takes additional damage from any source.
An undead cannot normally benefit from this - but I did it anyway: when he was reduced to less than 1hp (which usually destroys an undead) I let him use his resolve ability to keep animating his remains. He has two a day and he also happened to have challenged the paladin; the paladin dropped him but his resolve allowed him to keep standing and drop the paladin instead (which also allowed him to regain one resolve use for the day). It took a few more rounds after that and a really on-the-edge group of players for the remaining PCs to finally go all the way through and end Tsutamu.
What I liked about it; was that the high damage dealers could burn through Tsutamu's HP with their two-handed power attacks; but this was in-itself not enough to drop him. Once he was using resolve to keep standing any damage would be enough to drop him - but he could stay around long enough to really instill a sense of dread and urgency in the party.
In the end two of the party were unconscious and dying/stable, the third managed to do the final blow that dropped Tsutamu (while being himself staggered, so he fell unconscious right after that). And the fourth PC (a bard scared witless after she was already severely stat-drained from a severe case of filth fever who stood in the corner trying to be brave for her friends).
Great fun in other words :D
PS - oh, indeed the final attack to drop Tsutamu was a natural 20 confirmed by a second natural 20 - which the character (a monk) announced before rolling as his "ryuken style secret finishing move". It slayed Tsutamu and the monk fell unconscious afterward. A truly epic ending to the encounter.