Step 1. Normal Summon Scrap Recycler or Mathematician, then activate their effect, sending Crystron Sulfefnir to the graveyard
Step 2. Activate Sulfefnir's effect in the graveyard, discarding Crystron Smiger and special summoning itself
Step 3. Activate Sulfefnir's effect on the field, tributing itself to special summon any Crystron tuner from the deck
Step 4. Link Summon Crystron Needlefiber using the Tuner and Mathmatician/Scrap Recycler
Step 5. Using Needlefiber's effect, special summon Crystron Citree from the deck
Step 6. End your turn
During the opponent's turn
Step 7. Activate Crysron Citree's effect, special summoning Smiger from the graveyard and Synchro Summoning a level 5 Synchro Monster
Step 8. Activate Crystron Needlefiber's effect, Tributing itself to synchro summon Crystron Quandax from the extra deck
Step 9. Activate Crystron Quandax's effect, Synchro Summoning Crystron Pheonix using itself and the level 5 Synchro