| Final Forbidden Creature |
A Final Forbidden Creature is a two-sided card formed of four other cards acting as seals, and is the "Unsealed form" of a Final Forbidden Field. Despite it having a cost, it can't be put into the battle zone in any way but is instead accessed by removing all seals from its field form. Once it is put anywhere other than the battle zone, something bad will happen, such as forcing the player to put shields into their graveyard, or even causing the player to lose the game. However, due to 4 of its composing 5 cards acting as "forbidden cores", it can delay the loss of the game for as much as two times.
List of Final Forbidden Creatures
|Dormageddon X, Forbidden Armageddon|
|Darkness + Fire / Final Forbidden Creature / 999 / 999999|
| ■ Triple breaker
■ When this creature Forbidden Big Bangs, your opponent puts a seal on each of his creatures. (While creatures are sealed, both players ignore that creature.)
■ Your opponent can't put seals from his creatures into his graveyard.
■ This creature can't be sealed.
■ When this card would leave the battle zone, you may put 2 forbidden cores under this creature instead. If you do, put one of your shields into your graveyard.
■ If this card is is anywhere other than the battle zone, destroy all creatures, then you lose the game.