[Dang.....he's jealous. If only he could master every material there was in the world instead of just the four elements. (But then again, that'd be a loooooot of practice so maybe not.)

Most of the technical names - Alkemi, Fabrikator, Ravka - fly by his small mind, but he zeroes in immediately on "stop someone's heart". His brow furrows at the thought - why would anyone want to stop someone else's heart? - but he tries to push through nonetheless.]

If they can stop someone's heart that easily, does that mean they can start it again? And does that mean they could do the same with other organs in the body?