Noxious gas billows up from the sewer grate. PCs moving within 3 squares of it take 3 poison damage.
The cobblestones in the square are slick with spray from the fountain. Creatures starting their turn adjacent to them fall prone.
Townsfolk in the square distract the lizardfolk by throwing rotten fruit. Lizardfolk grant combat advantage.
Guards on the wall shout warnings, helping you avoid danger. PCs gain +1 on all defenses.
Drunken cheers for the Stumbling Giant embolden the heroes. PCs that spend an action point gain 10 temporary hit points.