I assume Buckthorn used 1 surge. Also, as a special treat with this trick, if he chooses to try to undo the shackles again (as he has not actually had the chance to do so), he can roll again. On the other hand, he can barely see in this shadowy dark.
Even in the dark shadows created by the bizarre sun-less sundial, it is hard not to see the sudden swarms. Masses of beetles, in the hundreds if not thousands, pouring from the runes in the walls with murderous intent.
What is not seen is Lucian, shadow skills fed by his fiendish origin and sepulcher-haunting present.
(order of posting…the tiefling and Halfling beet the initiative of the swarms
Lucian: surprise round, can take 1 action
Lucian: again, for winning initiative, full round of actions
Buckthorn: normal actions (no post and I will assume he goes to free the grey elf)
Beetles
Everyone (it would slightly better if Lucian and Buckthorn posted a bit latter at this stage, but ok if they don’t)
Lucian and Buckthorn should try to go by tonight...)