https://youtu.be/nJxCE2iDp08 - Watch video of all Class Spells Level 1: Opening all Silver Gates
Level 11: Opening all Zodiac Gates
Level 21:
Urano Metria
The ability to Force Close Gates so you can summon another Celestial Spirit instead
Level 31: Duel Gate Opening
Level 41: Able to open the 13th Gate, Ophiuchus
Level 51: Triple Gate Opening
Level 56: Star Dresses for all 12 Zodiacs and 13th Gate