Vidrik's heavy bolt shatters the skull of the skeleton in front of Sabian, and continues on down the hallway in a course that must have been blessed by Pelor, beheading two more zombies before cracking bones on the enemy spellcaster. The spikes fade away into the floor.
Chloe tosses acid on the nearby zombie, then runs past it to the alchemy lab as her homonculus fires a bolt of magic at it.
The undead, recently-made, follows after her and attacks again.
The other zombies follow, one managing to step past the flames in the hall.
The spellcasting skeleton approaches, and casts another spell. A cloud of horrendously smelly gas comes into existence, obscuring vision.
Spoiler
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Zombie takes damage.
Z2 OA
(1d20+3)[11] for (1d6+1)[4] miss
Conc checks (1d20)[5] for Bonfire
Z2 attack
(1d20+3)[13] for (1d6+1)[4] miss
Conc checks (1d20)[8] for Bonfire
Z5 moves through fire (1d8)[5]
Dex (1d20-2)[15] to negate saved
Stinking Cloud, DC 13
20' radius opaque yellow gas spreads around corners; creatures completely within cloud at start of turn make Con save, losing action on a failure
=> Sabian, Cassandra, Mustafar