Dark Contract with the Swamp King

【Regarding the ① effect】

This is an effect that creates a Chain Link that can be activated in the Spell & Trap Zone.

At the time of resolution, you perform the action of "using monsters from your hand or field as Fusion Material." Then, you perform the action of "Fusion Summoning 1 Fiend Fusion Monster."

Monsters used as material are sent to the Graveyard unless another effect is being applied. However, even if the Fusion Materials are not sent to the Graveyard due to the application of another effect, the Fusion Summon of the Fusion Monster will still occur as long as they left the hand or field.

When Fusion Summoning a "D/D" Fusion Monster, you can use monsters from your hand, field, or Graveyard as Fusion Material (if you use a monster in the Graveyard as Fusion Material, that monster is banished).

The action of using materials and the action of Special Summoning do not occur simultaneously.

【Regarding the ② effect】

This is an effect that creates a Chain Link that activates in the Spell & Trap Zone.

This is a mandatory effect.