Bella is out harvesting plants and is afraid she will be attacked. She demands PC protection until she can work a better deal with the few lizard folk nearby she works with.
4 troglodyte ambush + https://roll20.net/compendium/dnd5e/Giant%20Constrictor%20Snake#content
First are upwind and release stench (party gets advance notice since it drifts far) then snake ambush and Attempt to drown PC leader while trogs hold off rest of party.
Drowning: dc 5, 10, 15, 20, 25
Trogs = each has a shell necklace (2sp; normally they don’t care) now allies of Gwinn! Ideal for placing an agent.