Emergence

An Emergence is the event in which a young Elemental child first develops their magical abilities. Emergences can occur anywhere from shortly after birth to a child's fourteenth birthday, though never afterwards. Most commonly, Emergences occur between the ages of ten and fourteen, though earlier is not completely unlikely.

Hallas
(Main Article: Halla) 

If a child does not develop abilities, they are known as a halla. Hallas are considered extremely dangerous in all five of the United Elemental Nations states, and families are urged to send any child who does not develop their powers away immediately, or else they risk being murdered by the mysterious Iktsarpok.

For thousands of years, hallas were unheard of. In 2000 AF the first halla was discovered: a Ayera noble-child named Halla ya Moso, whose lack of emergence lead to the Halla Castle Massacre.