TCG Rulings

Mentions in Other Rulings

• G.B. Hunter: While “G.B. Hunter” is in play, you cannot activate effects that would return monsters to the Extra Deck, such as “De-Fusion,” “De-Synchro,” or “Compulsory Evacuation Device” targeting a Fusion or Synchro Monster.

OCG Rulings

• This card targets 1 face-up Syncho Monster on the field.^[1]

• Suppose that a Synchro Monster is flipped face-down by "Book of Moon" and then flipped face-up again. If it is targeted by "De-Synchro", then it returns to the Extra Deck, and you can Special Summon the Synchro Material Monsters from your Graveyard.^[2]

• Suppose that a Synchro Monster is banished by "Interdimensional Matter Transporter" and then Special Summoned by "Return from the Different Dimension". If it is targeted by "De-Synchro", then you cannot Special Summon the Synchro Material Monsters from the Graveyard.^[3]

• If a Synchro Material Monster(s) is removed from the Graveyard and then sent to the Graveyard again, then it is no longer considered a Synchro Material Monster(s) and you cannot Special Summon any monsters with "Synchro Cancel".^[4]

• When resolving the effect of "De-Synchro", if the Synchro Monster is not returned to the Extra Deck, then you cannot Special Summon the Synchro Material Monsters from the Graveyard. Thus, if "De-Synchro" targets a Synchro Monster which was Special Summoned by using "Eccentric Boy", then the Synchro Monster is removed from play and not returned to the Extra Deck, so you cannot Special Summon the Synchro Material Monsters from the Graveyard.^[5]

Versus Specific Cards

• Stardust Dragon: Suppose that "Stardust Dragon" Tributes itself and then Special Summons itself back to the field during the End Phase. If it is targeted by "De-Synchro", then it returns to the Extra Deck, but you do not Special Summon the Synchro Material Monsters from your Graveyard.^[6]

• T.G. Blade Blaster: Suppose that "T.G. Blade Blaster" banishes itself and then Special Summons itself back to the field during the next Standby Phase. If it is targeted by "De-Synchro", then it returns to the Extra Deck, but you do not Special Summon the Synchro Material Monsters from your Graveyard.^[7]

• Vanadis of the Nordic Ascendant: Suppose that you Synchro Summon "Thor, Lord of the Aesir" by using "Vanadis of the Nordic Ascendant" as a Synchro Material. If you activate "De-Synchro" on "Thor, Lord of the Aesir", then you can Special Summon "Vanadis of the Nordic Ascendant" and the other Synchro Material monsters from your Graveyard.^[8]

Previously Official Rulings

These TCG rulings were issued by Upper Deck Entertainment and have since been deemed unofficial by Konami.[9] They were previously considered official and can still be correct, as long as they follow the official gameplay rules, or unless Konami has issued a ruling that says otherwise. References: [10][11][12][13][14][15][16][17]

References

1. ↑ Konami OCG FAQ: Spell Card > De-Synchro
2. ↑ Konami OCG FAQ: If "De-Synchro" is activated against a Synchro Monster which became face-down and then face-up, then can you Special Summon the Synchro Material Monsters?
3. ↑ Konami OCG FAQ: Can "De-Synchro" target a Synchro Monster that was banished and then returned?
4. ↑ Konami OCG FAQ: With "De-Synchro", can you Special Summon a Synchro Material Monster which left the Graveyard, but is now in the Graveyard again?
5. ↑ Konami OCG FAQ: If "De-Synchro" is activated on a Synchro Monster that used "Eccentric Boy", then can the Synchro Material Monsters be Special Summoned?
6. ↑ Konami OCG FAQ: Can you Special Summon the Synchro Materials if "De-Synchro" is activated on a "Stardust Dragon" that Special Summoned itself?
7. ↑ Konami OCG FAQ: What happens if "T.G. Blade Blaster" is targeted by "De-Synchro" after it banishes and Special Summons itself?
8. ↑ Konami OCG FAQ: If you activate "De-Synchro" on a monster that used "Vanadis of the Nordic Ascendant" as a Synchro Material, then can you Special Summon?
9. ↑ Konami Judge Program Forum: Individual Email Rulings VS Individual Card Rulings
10. ↑ UDE FAQ: Individual Card Rulings [A-C]
11. ↑ UDE FAQ: Individual Card Rulings [D-E]
12. ↑ UDE FAQ: Individual Card Rulings [F-H]
13. ↑ UDE FAQ: Individual Card Rulings [I-K]
14. ↑ UDE FAQ: Individual Card Rulings [L-O]
15. ↑ UDE FAQ: Individual Card Rulings [P-R]
16. ↑ UDE FAQ: Individual Card Rulings [S-T]
17. ↑ UDE FAQ: Individual Card Rulings [U-Z]