Skeletons are known to have two main types of magic, "Passive" and "Active" Magic

Passive Magic is the term used for a type of magic that doesn't require much thought or energy and can be used very easily, Active Magic on the other hand requires more training, thought and control

Types of Passive Magic

Passive Magic is a type of magic skeletons use that is fairly easy and doesn't require much thought. Things such as certain forms of telekinesis, and "hair magic"

Skeletons and "Hair"

Skeletons can create hair using a form of passive magic commonly referred to as "hair magic". How this works is skeletons use thin strands of magic to mimic strands of hair. Because a skeleton's hair is directly linked to it's magic, this means a skeleton can change everything from the hair's color to it's style with hardly any effort. While male skeletons *can* use this, it is most commonly seen in females.

The same principle can also be applied to a skeleton's eye color by using a thin disk of magic around the eye sockets.

When a skeleton's magic is weak or fading, it will show up in their eyes and cause their "hair" to fade depending on how weak the soul is.

Active Magic

Active Magic is the word used to describe a stronger form of magic often requiring training and control to master.

When a skeleton activates this magic, their eyes tend to glow (which is how it got the name "Active" Magic)

This magic is used for things such as magic bullets, bone weapons and teleportation.

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More UT/ UnderInfection headcannons! ^^

Also mini fun fact; in this AU, female skeletons do exist but they're pretty rare with roughly 1/5th being female, especially after the war when most skeletons were killed

OH! That’s a good question!

I don’t mind ecto-stomachs and tongues at all! They’re actually some of my favourite things to draw, ‘coz I can mess with the glows and relfections with it.

And, as a fact, in my canon universes, all the Sans’ have an ecto-stomach (and tongues).

They use their tongues to take in food and transfer it into energy, whilst the stomach is there to store food, and absorb it later, for more magic.

Magic is like blood, to me, so, they need to breathe to keep it going.

“...the wonders of being inside Thun’s universes...”

Mhm, Error has an amber ecto-stomach, and eight blue tongues. You will find that most Sans’ have the same colour tongue and belly, like Nightmare, whose got purple, or Killer, whose is black.

I do know that some people don’t really like the idea of ectoplasm and whatnot, and I can see where they come from.

But I think it gives them a little more life and reason as to how they live. (If you have any problems with ectoplasm/magic, I’m sorry) They are something I like to write about a lot, too, especially with the details you can put in.

“To be honest, it’s sort of uncomfortable that Thun knows all of this...”

Bitch, I’m God, I know everything.

“Yeah, but still...”

(I also need to update Lines of Silver, too...hopefully I’ll get the next chapter out soon. It’s just awkward writing it on the computer, (for reasons readers should know :3 ) so, I stick to my tablet.))

(A NightError drawing is also coming soon, followed by an Ankh X Ink Oneshot, but I don’t know when I’ll get that done, with everything else on my back. Haha.)