Sabian cautiously moves forward, while Chloe prepares a spell and Cassandra casts one. The light moves back slightly, and up to the low (10') ceilling.
One of the wolves runs forwards, leaping into the air and trying to bite Chloe's light-carrying Servant. Its eyes reflect the light with a red glow, but otherwise it appears to be made of living shadow, somehow. It jaws close around the servant, but fail to kill it.
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Jump calculator says it can reach up to 10.5'H with a running start given its stats.
Shade Bite (1d20+5)[25] for (2d4+2)[6] crit! definitely a kill*forgot disadvantage from dodge, not a crit*
Servant Con save if needed (1d20+1)[14]
Hide check if available (1d20+5)[12] bad enough that most of the party probably knows where it is
It lands 10' in front of Sabian, but not very quietly.
As soon as the light goes out, something else moves forwards, a humanoid shadow with large horns, no taller than a human. It must have been waiting for the darkness.
=>Cassandra