Certu also moves his speaker-mouth-tower.
"I would normally have tutoring be done in the magic workshop, but for flesh magic, it's easier to do it here. I'll produce some flesh for us to work with. Give me a moment."
Slowly, a cube of pinkish slightly wriggling flesh starts to rise from the fleshy floor. The whole process takes a minute.
"There we go. This cube of flesh is separate from my body, so I cannot work it directly. We'll start with basic shaping. The sensations are similar to working with other materials – I assume you've used other elemental magics before – although flesh is harder. It moves unpredictably, at least at first. After you work with it for a while, you get intuition for where it's supposed to wriggle.
Cancer isn't an issue. You would need remarkably fine control, or do something requiring that and fail, in order to give someone cancer. The riskier part is moving flesh in a way it's not supposed to, and ripping apart organs or something. This is what makes flesh magic harder than other forms of magic. You necessarily must work with something alive. It's fortunate that I can remove lumps of flesh from myself, though. There's no risk to myself in the case you harm this cube."
He creates several meter long tentacles from the speaker tower.
"I'm more familiar with the tentacleperson way of casting, which involves no words and only gesturing. However, I'll teach you the humanoid form, which assumes you only have two limbs available for casting, and are able to speak. The rune for blood is Vol, and the rune for flesh is Lem. Let's begin by practicing making the cube grow and shrink. Beatrix told me that you've been casting spells based on pure mana control! That is very impressive. It's much easier if you chant while doing it, though, and for flesh magic, it's best to make things as easy and safe as possible."
His tentacles make a whipping motion, and he says "Volchirr lemhin." The cube grows with a squishing sound.
"Hin is the mode for growing. It is one of the two modes native to flesh magic. If you have mana control, which I believe you do, you can adjust the way it grows. Volchirr lemhin." The tentacles make a different motion, and a smaller secondary cube appears on the top of the first cube.
"Pes is the mode for withering. Volchirr lempes." The cube disappears, and a divot appears in the first cube.
"Try playing with the cube to get a feel for it. Actually, can Ophelia cast magic as well? If she can, I can create another cube for her to work with."