The two on Nar attack him, plus the one that had run pay him turns and attacks, as well.
The one on Jhishma attacks him. The others attack lightly armed townsfolk / or a dead horse.
Rolls
Dretches, 3 separate bite attacks (3 dmg) v Nar AC16 - (1d20+2, 1d20+2, 1d20+2)
1d20+2 : (7) + 2 = 9
1d20+2 : (4) + 2 = 6
1d20+2 : (18) + 2 = 20
Dretches, 3 separate claw attacks (5 dmg) v Nar AC16 - (1d20+2, 1d20+2, 1d20+2)
1d20+2 : (17) + 2 = 19
1d20+2 : (20) + 2 = 22
1d20+2 : (14) + 2 = 16
Dretch v Jhishma 3,5 dmg - (1d20+2, 1d20+2)
1d20+2 : (2) + 2 = 4
1d20+2 : (18) + 2 = 20
Dretch v townie 1 - (1d20+2, 1d20+2)
1d20+2 : (12) + 2 = 14
1d20+2 : (16) + 2 = 18
Dretch v townie 2 - (1d20+2, 1d20+2)
1d20+2 : (17) + 2 = 19
1d20+2 : (19) + 2 = 21
Dretch v townie 3 - (1d20+2, 1d20+2)
1d20+2 : (16) + 2 = 18
1d20+2 : (19) + 2 = 21
Dretch v townie 4 - (1d20+2, 1d20+2)
1d20+2 : (7) + 2 = 9
1d20+2 : (5) + 2 = 7