Brelal’reth stands inside the Inquisitor's Chamber of Crèche Y'llek, near the entrance. She will encourage the party to talk to the inquisitor and tell them it’s an honour. However, if the player character is a Githyanki themselves, she will react milder, expressing hope that they have brought good news.
Normal weapon damage + Superiority DieWeapon damage
Focus your attack on your foe's hands and possibly force them to drop the weapons they are holding.