Changing my vote >>6308611 to
> mark our current location with a fake ghost light for a return teleport with Phantom Cat Waltz; use Rapid Coffin Journey with Lively death qi to teleport to a site of impending disaster ( Ill Omen Herald, Xiōngzhàoxiānshēng ) and make it clear to the Gu master that he shouldn't attack innocents and children. Tax collectors, Ling armies, and stone statues are totally valid targets though. Teleport back afterwards.
>Buff him with our blood magics for the infusion if he agrees.