Step 1. Normal Summon the Level 4 F.A Monster
Step 2. Activate the F.A Field Spell, Giving the F.A Monster 2 Levels, making its level 6
Step 4. Using the F.A Monster's effect, Give itself an another level, making its level 7
Step 5. Activate F.A Auto Navigator's effect, decreasing the F.A. Monster's level and special summoning itself from the hand. Auto Navigator's level is 5, and the F.A Monster's level is 4. Additionally, add a F.A. Field Spell from your deck to your hand using Auto Navigator's effect
Step 6. Set the F.A. Field Spell in your hand, then activate it. This Makes the F.A. Monster Level 5
Step 7. XYZ Summon Cyber Dragon Nova using both F.A. Monsters, then XYZ Summon Cyber Dragon Infinity over Cyber Dragon Nova