Zamesi authors a custom contract for the occasion and heads out for the meeting in the Mastic Walk docks, keeping a keen eye out for any other potential participants in the ongoing wars while doing his best to keep a low profile himself. Once he finds Captain Bones he discretely approaches him for a private conversation.
"Greetings, esteemed Captain! I am known as the Broker, and I come to you representing a client of mine. This client who approached me is a participant in these so-called "Mage Wars" of yours, and has asked me to... Strike a deal with you, on his behalf. Something about avoiding potential ambushes, I believe. Regardless, this individual is quite interested in obtaining a [REAGENT FOR MAKING A PHYLACTERY], and seems convinced that you may be able to procure some for him. In return, my client wishes you to know that he is an individual with a significant influence within the Magus Organization and would be able to persuade them to ignore whatever conventional rules of the War you might happen to accidentally overstep, shall we say? Alternatively, I have been given authority to negotiate alternative ways of payment for such a favor, if there is anything else you would much prefer. So, how about it, Captain? Shall we parlay?"
Standard contract, but with an extra signature for the "Client", pre-signed "Count Rosendo" in barely readable handwriting by Zamesi
If a deal is struck: "My client will be most pleased with this. However, as with all my deals, I must ask that you sign this magically binding contract with your blood, as my client has already done and as I, too, shall do."