Step 1. Using Galaxy Brave's effect, Reveal Photon Vanisher in your hand and special summon Brave OR Special Summon Photon Thrasher using its own effect
Step 2. Activate Vanisher's effect, special summoning itself from the hand and adding Galaxy-Eyes Photon Dragon from your deck to your hand
Step 3. Link Summon Isolde, Two Tales of the Noble Knights using Brave or Thrasher and Vanisher
Step 4. Using Isolde's link summon effect, add Photon Thrasher or Brave to your hand (whichever was not summoned this turn)
Step 5. Activate Isolde's effect, sending Galaxy Zero from the deck to the graveyard and special summoning Flame Noble Knight Renaud
Step 6. Using Renaud's effect add Galaxy Zero from the graveyard to the hand
Step 7. Activate Galaxy Zero, Special Summoning Galaxy Brave or Thrasher from the Graveyard
Step 8. Link Summon Union Carrier using Brave or Thrasher and Renaud
Step 9. Using Union Carrier's effect, equip Photon Orbital from the deck to Union Carrier
Step 10. Tribute Photon Orbital using its effect, and add Galaxy Soldier to your hand
Step 11. Special summon Galaxy Soldier by discarding Galaxy-Eyes
Step 12. Using Galaxy Soldier's effect, add Galaxy-Eyes Afterglow Dragon to your hand
Step 13. Link Summon Galaxy Eyes Sol Flare Dragon using Isolde and Galaxy Soldier
Step 14. Using Sol Flare's effect, add Galaxy Soldier back to your hand
Step 14.5. Activate Melody of Awakening Dragon, discarding Galaxy Soldier to add Chaos Dragon Levianeer and another dragon from the deck to your hand
Step 15. Banish Isolde, Vanisher, and Thrasher/Brave to special summon Chaos Dragon Levianeer.
Step 16. Using Levianeer's effect, special summon Galaxy Eyes from the graveyard
Step 17. Special Summon Afterglow using its own effect
Step 18. XYZ Summon Number 68: Sanaphond the Sky Prison or Divine Dragon Knight Felgrand using Levianeer and Afterglow Dragon
Step 19. Use the XYZ Monster's effect, detaching Afterglow Dragon
Step 20. Using Afterglow Dragon's effect, Special Summon another Galaxy-Eyes from the deck
Step 21. XYZ Summon Number 90: Galaxy Eyes Photon Lord using both Galaxy-Eyes