"Then let us go through the armory, gear up, and be on our way. Cedric, should you want to head back to lure the others away, then I suggest the thugs here go with you. They must atone for their mistakes, and this is the path they will take."
Mal then pulls out one of his colored green chalk sticks and pulls out the masterwork elven dagger. Moving to the location of the acid that he spewed forth earlier, he calls Cedric over, as he bends to put the chalk flakes into the acid. He then dips the dagger into the acid and chalk, while speaking to Cedric in whispered tones.
"Emma has a trick. Something called an Arcane Mark. When I tell them that their lives are linked to yours, use your magic to draw the symbol on each of them. Once I use my chalk on the tattoo, cast any spell you know that will cause it to flare or be seen as empowering it. Once I draw at the tattoo with the dagger, release the spell." (Hoping he can cast LIGHT on it, then dismiss it)
He then stands, goes back to the thugs, and says, "You will go with Cedric. You will guard him with your life. Should you fail, then your life is forfeit. Haden did not have this power, but I have it bestowed upon me. Now, Cedric will inscribe his rune on each of you as visible. Then on me as invisible. Guard him well, or you both die."
He motions for Cedric to inscribe his rune on the two men, making it visible. Then, he points at the tattoo on his left shoulder. "This is the one that will bond them to you. Inscribe your mark on it and I will do the rest."
Once done, he then watches the light flare. He then traces the edge of the tattoo with the elven dagger, as the light then fades away as quickly as it came to be. "There. Now you are linked. It will last until I feel that he is safe and secured. Gear up, and be on your way."
BLUFF +13, hoping for an Aid Another from at least Cedric, lol...