From their position on the ground, Blackthornes, Azure and Naruk see the phantom marilith coming closer again. She leaves a building maybe twenty yards down the street, and, hidden underneath the building's tattered roof, watches the sky for a while. It seems like she hasn't noticed the group yet.
As she turns to another direction - still staring into the sky - Blackthornes and Azure see she's holding something in her middle right hand. A closer look reveals this "something" to be three severed humanoid heads, still bleeding.
With the help of the pipes of sounding, the Masked Gnoll clearly understands what Ian says to him.