| Card Name: | Subterror Behemoth Stygokraken | |
| Rarity: | Super Rare | |
| Type Line: | Monster | |
| Type Line: | Sea Serpent | |
| Type Line: | Effect Flip | |
| Attribute Symbol: | EARTH | |
FLIP: You can target Set cards on the field, equal to the number of "Subterror Behemoth" monsters you control; destroy them. You can only use this effect of "Subterror Behemoth Stygokraken" once per turn.
When a face-up monster you control is flipped face-down, if you control no face-up monsters: You can Special Summon this card from your hand in Defense Position. Once per turn: You can change this card to face-down Defense Position.
When a face-up monster you control is flipped face-down, if you control no face-up monsters: You can Special Summon this card from your hand in Defense Position. Once per turn: You can change this card to face-down Defense Position.