Heart Rhythm

Overview
Everyone on the planet has a different rhythm as their heart beat, but this also helps them to find the perfect love. People with similar heart rhythms tend to be attracted to each other. It is very rare for more than two people to have this.

People can also use this rhythm to create heart song, a class of spells which can only be used by that person with that heart rhythm. It is true that if someone has a similar enough heart rhythm as them, they may be able to use it to an extent, and an identical heart rhythm would be indication of being able to use it themselves, if taught.