Dark Double Tuning is an alternate form of Double Tuning in which a non-Tuner monster is combined with 2 Dark Tuner Monsters for a Dark Synchro Summon. In Dark Double Tuning, the Levels of the Dark Tuner Monsters are combined, and then the total is subtracted from the Level of the non-Tuner monster. What makes this easier than it seems is that the Level total of the Dark Tuner Monsters can exceed 12.
Example: 1 Level 5 non-Tuner - (1 Level 6 Dark Tuner + 1 Level 8 Dark Tuner) = 5 - 14 = a Level -9 Dark Synchro
Monster that use Dark Double Tuning:
- Evil Synchro - Vylon Omega