The Black Serpent
The Crossings of Poros #146 (x1)
(50) 0 2 1 8

Cannot leave the staging area or take damage. X is the stage number of the main quest.

The Black Serpent gets +X +X and +X

Forced: At the end of the encounter phase, either remove X progress from the main quest, or The Black Serpent makes an attack against the first player.