Upon approaching the two groups, Farlin asks for help fighting the Stone Lord's men, promising that the Guild will pay. If agreeing to help, the Guild joins the party in a fight against the Stone Lord's men. Doing so grants the inspiration Stacking the Deck for party members with the Criminal background.
If declining to assist, appealing to Cairos, or preventing either side from fighting, both groups turn hostile. The party can also wait nearby for the fight to begin, join in, or wait for it to end.
If Minsc is brought along, he can try to explain that he is the Stone Lord, but Caïros does not believe him.
If Caïros' side wins the fight and the party kill them afterwards, party members with the Criminal background gain the inspiration Easy Pickings.
Slam your weapon into the ground, dealing additional Thunder damage equal to your proficiency bonus, thunderously impacting nearby foes and possibly pushing them away.