Who is Slayer's patron of the moment? Im gonna take a guess.

“ "As you command," Luc replied, bowing, but the man was already making a gateway, a hole that opened into a snowy forest glade. He was gone before Luc straightened.” - WH, Ch22 Out of Thin Air

Ok, probably thinly relevant connections but I noticed that Luc's patron steps into a snowy forest glade. The only places where I noticed that had one and thought that the patron might want to travel to are:

1.The Traveling ground at the BT

2.The WC camp where Asunawa is staying.

1. “In truth, it seemed to turn, the view through it, a sunlit clearing among drought-draggled trees, rotating to a halt.” – LOC, Ch3, A Woman's Eyes

“In the Great Hall he grasped saidin, 'opened the hole in air and darted through into the clearing near the farm, letting the Source go.” – LOC, Ch11, Lessons and Teachers

“The clearing was browner than he remembered, more leaves crackling under his boots and still fewer on the trees. Some of the pines were completely yellow, and a number of leatherleafs stood dead, gray and bare. But if the clearing had changed, the farm was altered almost beyond recognition.” – LOC, Ch42, The Black Tower

2. “On the far side of the clearing, just inside the treeline, was a rude house that had once belonged to a charcoal burner, a single room with winter-brown weeds thick in the gaps between the stones.” – CoT, Prologue

I put No2 as a possibility.

So it is obvious that the patron does not want to be recognised, and that he also does not want anyone to know what he is doing. The only possible candidates that I can think of that would fit this criteria are Demandred and Mazrim Taim.

Firstly with Demandred, a Forsaken with absolute hatred towards Rand. Ive put him here because of a thin link between him and Asunawa (see my “Demandred within the WC's” theory). I think that Dem has been travelling to the WC camp which could coincide with the clearing in the forest where the WC is staying. Really pushing it, I know.

However, why would he disguise himself? Perhaps to avoid Moridin's displeasure at having gone against his order to take Rand and only kill him if necessary (the assassination attempt happens 5 days after the Forsaken Coffee Hour according to the WoT chronology site). Or he could have been looking for the Chodean Kal access keys. Possible but unlikely.

"Killed?" Moridin moved his hands as though weighing something. "If it comes to that, yes," he said finally. "But finding him is no problem. When he touches the Choedan Kal, you will know where he is. And you will go there and take him. Or kill him, if necessary. The Nae'blis has spoken." - WH, Ch13, Wonderful News

"Kill him," the M'Hael had ordered before sending them to Cairhien, but he had been as displeased that they were found out as that they had failed. Far Madding was to be their last chance; he had made that as plain as polished brass. Dashiva had simply vanished. Kisman did not know whether he had run or the M'Hael had killed him, and he did not care.

"Kill him," Demandred had commanded later, but he had added that it would be better they died than let themselves be discovered again. By anyone, even the M'Hael, as if he did not know of Taim's order.

And later still, Moridin had said, "Kill him if you must, but above all, bring everything in his possession to me. That will redeem your previous transgressions." The man said he was one of the Chosen, and no one was mad enough to make that claim unless it was true, yet he seemed to think al'Thor's belongings more important than his death, the killing incidental and not really necessary. – WH, C22, Out of Thin Air

"Do you want me to try again?" Luc asked.

"Perhaps. When I tell you. Not before. Remember, not a word of this to anyone." - WH, Ch22 Out of Thin Air

Mazrim Taim. He ordered the killing of Rand by his Fab-four ashaman as seen in WH.

He knew where Rand was at the time of the assassination attempt.

Slayer asks him if he would like him to try again. The patron's reply is “maybe. But not before I tell you to”. This to me means that he was not at the Forsaken coffee hour, and does not know what Rand plans and how he will be found (when he uses the CK).

He steps into a snowy forest glade, which quite possibly means the travelling ground at the BT.

“Few save the Chosen knew how to reach him, and none of the men among those few could channel, or would have dared trying to command him.” WH, Ch22, Out of Thin Air

This is the only thing that goes against MT. Slayer knows who can and cant reach him, and those men apart from the Forsaken can't channel.

However, MT has been known to take matter into his own hands eg kill Rand in tPoD, but this may have been on Demandred's order, which of course would go against Moridins order of ‘don't kill rand'. So it is likely that MT was working on his own since the end of POD. This is supported by the fact that both Dem and Mori show up after the Forsaken Coffee Hour in WH with orders to kill Rand. So, MT is working on his own, probably without any guidance of from the Forsaken.

I also think that MT has been trained by one of the male Forsaken, probably Moridin or Demandred, since they both were able to reach the Fab-four, so one of them has to have contact with MT. If MT was trained by one of them, there is a possibility of them telling him how to reach Slayer. The disguise is just to fool Slayer so that he doesn't know of the ‘few outside the Chosen' is commanding him.

So, based on somewhat flimsy evidence I think that MT has been commanding Slayer behind Dem and/or Moridin's back.