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2: Healing and forbidden magic

Healing magic is actually very complicated.

First, you have to understand the difference between internal and external mana. It's somewhat similar to the difference between HP and MP in a game.

External mana is used to activate magic, while internal mana is naturally used by the body to function. When the body gets hurt, it uses up internal mana to heal.

What healers can do is:

1) Lend their external mana to others.

2) Convert their external mana into internal mana. Since they can be given more than the maximum their body would normally have, this also means they can heal from wounds they would otherwise cripple or kill them.

However, there’s also a third step to healing that isn’t always necessary.

3) They can also take back their own mana if it hasn't been fully used. The "forbidden magic" Dominic used against the viscount was actually just a loophole in this process.

It's pretty easy to understand if you compare it side by side.

If the healer were to give the command to take their mana back, how would the recipient's body know what mana belongs to them and what doesn't? It's not like the body has a reserved parking space for foreign mana—it would be impossible to separate.

So who does this "mixed" mana belong to? The answer is actually both of them. After all, the recipient was able to heal using it. And this also means that the healer can still give it the command to come back.

This means that a healer who knows this forbidden trick can completely drain a person's life force at any time as long as they have healed them at least once in the past.

Don't try this at home, kids.