Judging from the current situation, Snape could not pass any message to Vizet; even a hint would be difficult.
After all, that prophet was watching with the Heavenly Eye. Any unnecessary action, or anything that did not align with Voldemort's wishes, could invite suspicion.
So he had to wait. Once the day the mission began arrived, things would be different.
As long as he waited until the mission was underway, he would have ample reason to make contact with Vizet.
At that point, he could have a few conversations with Vizet while carrying out the mission.
The content of those conversations did not need to be complicated. They only needed to serve the purpose of testing him.
What he needed to test was whether Vizet knew the truth, and whether Vizet's reaction would be as he expected.
Vizet was perceptive enough; of that, he had never doubted.
He believed that as long as he offered an appropriate hint, Vizet would understand what he meant from that single remark.
Snape opened his eyes, his gaze falling once more upon the arm that "Lily Evans" had held.
Now that he had clarified these matters, there was only one thing he needed to do: play the role of a "loyal servant" well in front of Voldemort.
Or perhaps he also needed to suppress his nausea and murderous intent and play the part of someone "infatuated with Lily Evans."
Simply staring at his arm was not enough. He needed to do something, at the very least, to play the role convincingly.
For example... sending that "Lily Evans" some undiluted Bubotuber Pus seemed like a rather good choice.
Undiluted Bubotuber Pus was highly corrosive. As long as it came into contact with skin, it could inflict injuries akin to severe burns.
He would not mention