Fiend / Tuner / Effect

If this card is destroyed by battle and sent to the Graveyard: Special Summon 1 Level 1 Fiend-Type monster from your Deck.

Fiend / Synchro / Effect

1 Fiend-Type Tuner + 1 or more non-Tuner monsters

When this card destroys an opponent's monster by battle and sends it to the Graveyard: You can have this card gain 800 ATK until the end of the Battle Phase, also this card can make a second attack in a row.

Fiend / Effect

If this card destroys a monster by battle and sends it to the GY: Inflict damage to your opponent equal to the original Level of that monster in the GY x 100. You can banish this card from your GY; Special Summon 1 Fiend monster with 2000 or less ATK from your hand.

Wyrm / Effect

When this card you control is destroyed by battle or card effect and sent to your Graveyard: You can Special Summon 1 "Yang Zing" monster from your Deck in Defense Position, except "Suanni, Fire of the Yang Zing". You can only use this effect of "Suanni, Fire of the Yang Zing" once per turn. Once per turn, during your opponent's Main Phase or Battle Phase, you can: Immediately after this effect resolves, Synchro Summon 1 Synchro Monster, using only "Yang Zing" monsters you control (this is a Quick Effect). A Synchro Monster that used this card as a Synchro Material gains 500 ATK and DEF.

Warrior / Effect

If this card is Normal or Special Summoned: You can equip 1 FIRE Warrior or 1 Gemini monster from your hand or Deck to this card as an Equip Spell that gives this card 500 ATK. If this card in its owner's control is destroyed by an opponent's card while equipped with a Gemini monster(s): You can Special Summon as many of those Gemini monsters from your GY as possible, as Effect Monsters that gain their effects. You can only use each effect of "Sublimation Knight" once per turn.

Dinosaur / Effect

The first Normal Monster you control that would be destroyed by battle or card effect each turn, is not destroyed. If you control a Normal Monster: You can Special Summon this card from your hand. You can only use this effect of "Submareed Tour Ride" once per turn.

Aqua / Effect

During battle between this attacking card and a Defense Position monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent.

Machine / Effect

This card can attack your opponent directly, but when it does so using this effect, the battle damage inflicted to your opponent is the original ATK of this card. At the end of the Damage Step, if this card battled: You can change this card to Defense Position.

Fish / Xyz / Effect

2 Level 3 monsters

Once per turn: You can detach 1 Xyz Material from this card; inflict 100 damage to your opponent for each of your banished monsters.

Aqua / Effect

You can Tribute 1 monster to Special Summon 1 "Frog" monster from your Deck, except "Frog the Jam". "Frog" monsters, except "Frog the Jam", cannot be destroyed by battle.

If you control exactly 3 non-Token monsters with the same name, and no other monsters: You can add 3 monsters with the same name as each other from your Deck to your hand. For the rest of this turn after this card resolves, you cannot Normal Summon/Set or Special Summon monsters with the added monsters' name, nor activate their monster effects. You can only activate 1 "Subsurface Stage Divers" per turn.

You can banish 1 "Subterror" monster from your Graveyard; for the rest of this turn, face-down monsters you control cannot be destroyed by card effects, and your opponent cannot target them with card effects. If this card on the field is destroyed by a card effect: You can add 1 "Subterror" monster from your Deck to your hand. You can banish this card from your Graveyard, then target 1 "Subterror" monster you control; change it to face-down Defense Position.

Zombie / Flip / Effect

FLIP: You can activate this effect; this turn, "Subterror" cards you control cannot be destroyed by your opponent's card effects. You can only use this effect of "Subterror Behemoth Dragossuary" 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.

Wyrm / Link / Effect

2 Flip monsters

Gains ATK equal to the combined original Levels of the "Subterror" monsters used for its Link Summon x 100. During your Main Phase: You can send 1 Flip monster from your Deck to the GY, and if you do, Special Summon 1 monster from your hand in face-down Defense Position to your zone this card points to. You can only use this effect of "Subterror Behemoth Fiendess" once per turn. Once per turn, if a monster this card points to is flipped face-up: Add 1 Flip monster from your Deck or GY to your hand.

Aqua / Flip / Effect

FLIP: You can send 1 card from your Deck to the Graveyard. You can only use this effect of "Subterror Behemoth Phospheroglacier" 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.

Fiend / Flip / Effect

FLIP: You can target 1 monster on the field; change it to face-up Attack Position if it is in Defense Position, also change its ATK to 0. You can only use this effect of "Subterror Behemoth Speleogeist" 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.

Rock / Flip / Effect

FLIP: You can discard 1 "Subterror" monster, and if you do, draw 2 cards. You can only use this effect of "Subterror Behemoth Stalagmo" 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.

Sea Serpent / Flip / Effect

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.

Pyro / Flip / Effect

FLIP: You can change all other face-up monsters on the field to face-down Defense Position. You can only use this effect of "Subterror Behemoth Ultramafus" 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.

Reptile / Flip / Effect

FLIP: You can target 1 monster your opponent controls; banish it. You can only use this effect of "Subterror Behemoth Umastryx" 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.

Thunder / Flip / Effect

FLIP: You can target 1 Set monster your opponent controls; take control of it until your next End Phase. You can only use this effect of "Subterror Behemoth Voltelluric" 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.

All "Subterror" monsters you control gain 500 ATK and DEF for each Set monster on the field. Once per turn, when a "Subterror" monster you control inflicts battle damage to your opponent: You can target 1 "Subterror" card in your Graveyard, except "Subterror Cave Clash"; add it to your hand.

Spellcaster / Effect

When your opponent activates a card or effect (Quick Effect): You can send this card from your hand or field to the GY, then target 1 "Subterror" monster you control; negate the activation, then change the targeted monster to face-down Defense Position. You can target 1 face-up monster you control; change it to face-down Defense Position, and if you do, Special Summon 1 "Subterror" monster from your hand or GY, in face-up or face-down Defense Position. You can only use each effect of "Subterror Fiendess" once per turn.

Activate 1 of these effects, also, after that, Set this card face-down instead of sending it to the GY.

● Change 1 Set "Subterror" monster on the field to face-up Attack or Defense Position.

● Change 1 face-up "Subterror" monster on the field to face-down Defense Position.

● ATK/DEF of 1 "Subterror" monster on the field become equal to its combined original ATK/DEF until the end of this turn.

● This turn, activated effects of "Subterror" cards cannot be negated.

Dragon / Flip / Effect

FLIP: You can add 1 "Subterror" card from your Deck to your hand, except "Subterror Guru". You can target 1 other face-up monster on the field; change that monster, also this card, to face-down Defense Position. This is a Quick Effect if you control another "Subterror" card. You can only use each effect of "Subterror Guru" once per turn.