The Key Guardians of Phazon are 6 beings native to Phazon, each guards a key to the Chamber of the Source, where a powerful sword is located. The seventh key is the only key without a guardian.
- North Tundra (Ice Temple) - Frostorm
- Great Archipelago (Volcano Ruins) - Raliace
- Phazacropolis (Great Palace of Phazon) - None
- Dark Crater (Deep Core) - Mershadow
- Draycan Canyon (Khazak Pits) - Scaldera
- Phazamon Jungle (Stone Temple) - Phazoldos
- Desert of Phazactus (Ruined Fortress) - Zykron