When approached, a cutscene plays out where Spike is torturing Liam, and he asks the party to join him. The party can join and / or take over the interrogation, force Grush and Spike to leave using their Illithid tadpole, or lie to them that they have been relieved of their duties.
If the party torture Liam such that he reveals the Emerald Grove's location, Grush informs Minthara, who prepares an assault on the Grove. After informing Minthara, they move to where Abdirak is and loiter.
If they witness a party member undergo the pain ritual, Spike claims, that he needs to "see it again" and commands Grush to undergo the ritual as well. The party can humorously watch as Grush takes hit after hit, eventually succumbing and getting Knocked Out.
Normal weapon damage + Superiority DieWeapon damage
Spend a superiority die to deal normal weapon damage + 1d8Weapon damage and possibly Frighten the target.