Rules glossary
↑ Parent rule: 716.2 A class level bar is a keyword ability that represents both…
716.2a “[Cost]: Level N — [Abilities]” means “[Cost]: This Class’s level becomes N. Activate only if this Class is level N-1 and only as a sorcery” and “As long as this Class is level N or greater, it has [abilities].”
No sub-rules.