Mormesk dodges the rays and casts Greater Hedged Imprisonment.
A skeletal judge appears from the negative plane sitting at a regal wooden desk engraved with macabre scenes of skeleton warriors and angels caught in epic battle. The spectator is restrained by spectral chains that glint in the cave lights that line the walls. The judge seems to be looking over dark ethereal paperwork and points a long boney finger at the Spectator. Though he says nothing audible, it's clear a conversation is occurring between them on another plane.
The judge pounds a ornate ebony gavel and both the judge and the Spectator are instantly teleported out of the material plane. Yulya can instantly tell that the barrier the Spectator has been maintaining is down. This means too that Nezzner has a chance to escape.

You get a communication from Mormesk, "I presume you can handle this situation, I shall return soon to collect my payment as we previously agreed." He disappears without a trace.

Nezzner is taken down on the third attempt and as Alice holds him he says in frustration, "This is outrageous!" His struggles are moot.

You are left with the flaming skulls, the Bulette, and Nezzner who could still be a challenge.

The spectator's flaming skulls move to get a clear shot at Mormesk and fire rays of lightning bolt and fire bolt.
Mormesk dodges the rays and casts Greater Hedged Imprisonment.
A skeletal judge  appears from the negative plane sitting at a regal wooden desk engraved with macabre scenes of skeleton warriors and angels caught in epic battle. The spectator is restrained by spectral chains that glint in the cave lights that line the walls. The judge seems to be looking over dark ethereal paperwork and points a long boney finger at the Spectator. Though he says nothing audible, it's clear a conversation is occurring between them on another plane.
The judge pounds a ornate ebony gavel and both the judge and the Spectator are instantly teleported out of the material plane. Yulya can instantly tell that the barrier the Spectator has been maintaining is down. This means too that Nezzner has a chance to escape.

You get a communication from Mormesk, "I presume you can handle this situation, I shall return soon to collect my payment as we previously agreed." He disappears without a trace.

Alice fixates Nezzner and prioritizes keeping him from using somatic or verbal commands. She tries stretching out his arms for Cat to cut off his rings.
With a focused and deft heavy blow Cat manages to lop off three of his rings. As the fingers separate from his body, you see one of them clearly attempting to heal before it falls helplessly to the ground, another instantly disappears to an unknown location using greater teleport, a third clings to life for a few moments before finally giving up the ring. As you can clearly see, he had quite a few tricks up his sleeve.
With enough leeway to dodge, but at the disadvantage of Alice's grapple, Nezzner defies logic and avoids all damage from Yulya's attack!

In a brilliant flash of light both Nezzner and Alice disappear.
Yulya doesn't know what he did other than use his amulet but she can't sense his magic any longer, just like the Spectator, he's just gone and Alice with him.

Yulya is shocked, apparently, to find out that these abominations are actually undead, unlike the ghouls, and Inflict Wounds uses necrotic damage which actually heals undead due to it's negative energy. Though Bane does work, she wastes 1MP and 1SP in the process, leaving the two in otherwise pristine condition.

At the very least, they are affected by Bane. And Cat is miraculously spared by the fireballs

Yulya attempts to turn the undead skulls. [WIS vs DC15 1d20=10,10]
Her holy magic fills the room with divine light, and both skulls are frightened by the light. They disengage and move unerringly away at full dash into the next room.

Uhh, thank you very much! I need to give this head to Mormesk so he will let us go so thank you for saving it... he's not gonna become an undead like this, right?

I'm sorry I can't even give you a candy in return. But if you visit me in the material plane, I have collected a lot of ears, you an have some in exchange!

Even though I brought such peril to your world, you still treat me with kindness and respect? Alice shall not forget this! Wherever I went before, I was either seen as a monster to be hunted with torches and pitchforks, or a valuable specimen to be captured and experimented on.

I am afraid there is still far greater danger to this world than this strange man. My ship! I never planned to land it here, the Mechatherial Candygoddess confessed to crashing it on purpose. Don't ask me why. But regardless of that, I need to get it back and have it repair itself or it will eventually bring doom to this world one way or another.