At the Cormanthor forest

After visiting the dwarves and discussing things with them Mark walks into the Cormanthor Forest where he looks around and takes a deep breath before shouting as loud as he is able "LYOOOOOOOOOOOOOOOOOOOOOOONS!!" as a summoning call.
He then crosses his arms looking around and repeats the process every 30 minutes.

Shouting around so loud and often, Mark would soon attract unseen eyes watching him from the shadows.

After another of those calls a roving band of hungry Undead would fall upon him.

Mark grunts at the attack blaming the Lyons for being so stupid as to live in a forest with Undead and throws a tanglefoot bomb at the Undead (DC 47 Reflex or be rooted for 5 rounds) and makes his way out of the forest while cursing about nature circles, Lyons and necrophiliacs.

The tanglefoot bag is sufficent to delay the undead so Mark can make his escape.

From the shadows a soft chuckle could be heard by trained ears.

While running Mark looks at Aesha and grunts
"Listen, imp-sized red-eyed mushroom-addict, one of you Lyons killed an innocent baby so..." Mark looks around for more enemies and changes course through the forest in case they are following "...So I am here so you can pay for it, I need help to rescue someone, a soul for a soul, right? I need allies and you nutjobs are the best spellspinners around. Take that to daddy oak or whoever the hell calls the shots, I'm out of here towards my freaking camp!"
With that Mark keeps running until he's out of the forest.

((Assuming the chuckle was Aesa))

Mylanis steps out into the clearing, looking to Aesa.

What he thinks we have done, we haven't. What we did do is kill a drow which simply claimed to the pregnant, with no evidence to support it. A soul for a soul is a terrible way of life, with the same logic, the world wouldn't cease destroying itself, for there's no such thing as a true value for a soul, each is as unique as the rest, and each to be kept safe it possible. This time he came to the wrong people, this is none of our concern, we shall not involve ourselves with someone who is just as likely to hurt us, as he is to insult us.

Maya to Mylanis: "Don't worry Mylanis, this is not real Mark, it's a Clone, we have to save that soul from him, he uses souls to multiply himself into many Marks. Come with us let's see his camp, he may take us to the real Sharkomancer Lord."

There's no such thing as a clone of Mark, I would have seen if it was.

What you likely call a clone, would either be a person that looks like Mark, or one which has the same name. Having the same name is not uncommon, even less so with a name like that among humans I believe. Or if you met someone who looks like him, it could just be a rare coincidence.

Aesa Yells after him

"You have been deceived! We killed no child, and you should stop accusing us or killing that Drow child, for there was none!"

And with those words resounding through the forest, loud enough to follow Mark upon his wake, Aesa makes a U turn and flies back to Lyon's forest where she warns Leo and Maya what had happened. She herself lands with a sigh somewhere in Maya's forest and looks with a sadness in her face to a statute. Every time Mark mentioned that incident, she turns to that statue wandering what the person portrayed in that statue would say.. to Mark? Yes, especially to him.

No, here's the only logical explanation,

Mark asks for our help, because he knows most of us are powerful spellcasters, who actually keep to our words. A rare things these days, and there's likely no-one else for him to go to, as most other wise people would've turned him away, just as we are going to. He can't go to any of the cities of the area, because he's managed to gotten himself banned from them, which means all the people there is also out of his reach, however we dont live in the city, so he comes to us.

Likely someone who actually managed to be friendly with him, and wasen't around him long enough to see how hard-headed he is. Or someone he thinks he can save, because someone worse than his usual enemies has them.

In either case, then he will have to find a way to deal with it without our help, gods only knows what he's actually planning, and we arn't going to involve ourselves with him, he's hurt our family enough.