1 Dragon Tuner + 1+ non-Tuner Dragon monsters
If this card is Synchro Summoned: You can target 1 FIRE Dragon monster in your GY; Special Summon it, also you cannot Special Summon for the rest of this turn, except Dragon monsters. If 3 or more attacks have been declared this turn (Quick Effect): You can Special Summon this card from your GY, then you can destroy 1 Spell Trap on the field. You can only use this effect of Sangenpai Bident Dragion once per Duel, and its previous effect only once per turn.