[Oh shit...maybe that wasn't the best way to try to tell your friend the dangers of your magic.]

It won't if you know what you're doing.

My magic runs on Magoi, which is essentially life energy, you run out of the stuff, you die.

You will know if you start to go low on Magoi, your body will feel sore and it will get more difficult to perform magic.

That is when you should stop, rest or find another source of fire to absorb.

or if you happen to be prepared. Elliot's magic Pepsi blue will also do the trick.

I always keep a few bottles of the stuff in my bag, helps that it can heal the body as well as restore magic.