If you Summoned Red Dragon Archfiend(Red Nova Dragon): Special Summon Creation Resonator. Tune Red Dragon Archfiend with Effect Veiler and Creation to Synchro Summon Red Nova Dragon
To Summon Red Nova Dragon, you’ll need to Tune Red Dragon Archfiend with 2 Tuners. This may seem difficult, but in a Deck built around Red Nova Dragon, it’s a lot easier than it sounds.
Red Nova Dragon is the first Level 12 Synchro Monster, and the first monster that requires 2 Tuners to Synchro Summon it. But in exchange for all of the trouble you need to go through to get it on the field, Red Nova Dragon gives you incredible power. Not only does Red Nova Dragon start with 3500 ATK, it also gains an extra 500 ATK for every Tuner in the Graveyard! Red Nova Dragon also can’t be destroyed by Spell, Trap, or monster effects, and can negate an attack every turn. That’s a lot of power for one monster!
No matter which approach you use to Synchro Summon your Red Dragon Archfiend, you’ll need to get 2 Tuner monsters on the field along with it if you want to Synchro Summon Red Nova Dragon. Unless you’re planning to change the level of your Red Dragon Archfiend with a card like Mischief of the Yokai, you’ll also need the Level of those 2 Tuners to add up to 4. Fortunately, there are a bunch of Tuners that can Special Summon other Tuners to the field.