As the zombies pile out of the carriage, Keanu fires an arrow into the lead one. It passes harmlessly through the undead flesh. Kaine stabs at one, striking and doing similarly no damage. Rasan's knife strikes home, doing no damage. Willow tries shooting a ray of frost into the undead, missing badly. Keanu's second arrow also misses.
The zombies mindlessly swing at Kaine, failing to connect.
Mor-Rioghain fires of a fan of flame that singes the zombies and the carriage. Surprisingly, the clumsy, slow, awkward things nimbly avoid the worst of the blast.
Dannok runs up, gets hit as he approaches but shrugs off the blow before cleaving the zombie asunder with a mighty blow.
Note: any of that may change depending on Naimless' post