Round 13
Tenebryn nails one of the sahaugin with magic missile #8 (5 pts dmg). The two remaining sahaugins in the water near the cave then submerge as missiles rain down on them.
I'll assume Tor uses his partial action to pick up his chain before venturing into the cave.
Round 13
Irene edges into the cave. Moving in about 20 feet along the wall, she can see nothing in front of her. The wall is cold, damp, rough stone. Somac gropes in behind her, one hand on the wall, the other on his greatsword. Nurlan reloads his crossbow and moves forward, to the edge of the hut. He senses the inspiration of his song is ending.
Inside the dark cave, Irene hears a familiar laugh. "Back again, are you, my dear?" says Jezibel. A sharp pain explodes in Irene's side. Her hand falls to the bite, and she finds a dagger sticking out. Her hand is now wet with her own blood. (7 pts dmg)
Ashnar sprints across the sand and reaches the cliff wall outside the cave. Rinaldo enters behind Somac. Tor enters behind him (does he have chain or bow readied? He also sense he only has one round of rage remaining.)
Inside the cave, the clank of metal is heard. Irene and Somac vaguely sense armored forms charging forward. Battle axes connect in the dark, further injuring both. (2 more to Irene, 7 to Somac)
Outside on the beach, Charlyn and Tenbryn notice four sahaugin emerge from the waters on the other side of the beach near the square hut. They march up the beach towards the hut armed with tridents. In the water, two more sahaugin heads surface. A bolt flies towards Charlyn, and one towards Tenebryn. Both miss.
Charlyn and Tenebryn can still act in round 13 (& post your round 14 action)