The surviving spiders attack

vs Berserker
(1d20+5)[6] - [1]+poison - (1d2)[1] Str damage (Fort DC 10 negates)
(1d20+5)[19] - [1]+poison - (1d2)[2] Str damage (Fort DC 10 negates)

vs Iriander
(1d20+5)[12] - [1]+poison - (1d2)[1] Str damage (Fort DC 10 negates)


The swarm stretches to engulf everyone, provoking AoOs from Iriander and Ash as it enters their space, since they didn't take total defense actions.
Swarm - (1d6)[3] + Nausea (Fort DC 11 negates) + (1d3)[1] Str damage (Fort DC 11 negates)