Yesterday we encountered the Shattered Souls in the Severed Hand ruins. They used "Shadow Pact" on their allies. At the end of the fight, we met two Souls who were both "near death" and who stood there facing each other, spamming Shadow Pact onto each other.

We found nothing about this spell or ability on the net. We suspect the Shattered Souls gave their own hitpoints to their allies we killed afterwards, leaving them "near death" after the fight without taking any direct damage from the heroes. The remaining two Souls didn't know better than to use Shadow Pact on each other again and again, until our Fighter/Thief released them from this neverending circle with a well placed Backstab to one of them (surprisingly, they can be backstabbed, being ghostlike beings after all).

Are we guessing correctly that Shadow Pact gives one's own HP to another? Or what does this spell/ability instead?

Thanks

V4V

Shadow Pact is nothing more than a 'Cure Light Wounds' sort of spell that uses a projectile in a reverse Vampiric Touch (health transfers from source to target) manner. So yes, you are essentially correct.

Now that you say it, the two Shattered Souls played some kind of magic "ball game" when we found them behind some columns. :)

Thanks for the clarification. It explains why they were locked in this spell casting cycle. They tried to heal one another but couldn't because both were probably down to 1 HP, and the AI wasn't smart enough to recognize that.

I think it would have been interesting if that effect were available in a player-castable arcane spell.

This way, mages would be able to head using a somewhat different method; transfer health to allies, then use Trollish Fortitude to heal the transferred damage.