Mergemidon

Mergemidon Arachne
Level 4 EARTH Insect/Effect
1800/1600
During your Main Phase: You can activate this effect; destroy this card, and if you do, Special Summon 2 "Mergemidon Arachne" from your Deck in Defense Position, also you cannot Special Summon monsters for the rest of this turn, except Insect monsters. (Quick Effect): You can banish this card from your GY, then target 1 "Mergemidon" monster you control; it gains 1700 ATK until the end of this turn. You can only use each effect of "Mergemidon Arachne" once per turn.

Mergemidon Aristaeus
Level 4 EARTH Insect/Effect
1200/1800
During your Main Phase: You can activate this effect; destroy this card, and if you do, Special Summon 2 "Mergemidon Aristaeus" from your Deck in Defense Position, also you cannot Special Summon monsters for the rest of this turn, except Insect monsters. You can only use this effect of "Mergemidon Aristaeus" once per turn. If a "Mergemidon" Switch Monster(s) you control would be destroyed by battle or card effect, you can banish this card from your GY instead.

Mergemidon Cerambus
Level 4 EARTH Insect/Effect
1700/1200
During your Main Phase, you can Normal Summon 1 "Mergemidon" Switch Monster, in addition to your Normal Summon/Set. (You can only gain this effect once per turn.) During your Main Phase: You can activate this effect; destroy this card, and if you do, Special Summon 2 "Mergemidon Cerambus" from your Deck in Defense Position, also you cannot Special Summon monsters for the rest of this turn, except Insect monsters. You can only use this effect of "Mergemidon Cerambus" once per turn.

Mergemidon Melissa
Level 7 EARTH Insect/Switch/Effect
2400/1700
2 Insect monsters with the same name
Once per turn: You can banish 3 Insect monsters with the same name from your hand, field, and/or GY, then target 1 face-up monster your opponent controls; take control of that target, but send it to the GY during the End Phase of this turn.
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During your opponent's Main Phase, if a monster(s) is Special Summoned to your opponent's field and this card is in your hand, you can: Immediately after this effect resolves, Tribute Summon this card. Once per turn (Quick Effect): You can banish 3 Insect monsters with the same name from your hand, field, and/or GY; this card gains 2400 ATK until the end of your next turn.

Mergemidon Myla
Level 4 EARTH Insect/Effect
1400/1700
When this card is Normal Summoned: You can add 1 "Mergemidon" Spell/Trap from your Deck to your hand. During your Main Phase: You can activate this effect; destroy this card, and if you do, Special Summon 2 "Mergemidon Myla" from your Deck in Defense Position, also you cannot Special Summon monsters for the rest of this turn, except Insect monsters. You can only use this effect of "Mergemidon Myla" once per turn.

Mergemidon Myrm-X
Level 8 EARTH Insect/Switch/Effect
2600/2400
2 Insect monsters with the same name
Once per turn: You can banish 3 Insect monsters with the same name from your hand, field, and/or GY; destroy all monsters your opponent controls OR all Spells and Traps they control.
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During your opponent's Main Phase, if a monster(s) is Special Summoned to your opponent's field and this card is in your hand, you can: Immediately after this effect resolves, Tribute Summon this card. Once per turn (Quick Effect): You can banish 3 Insect monsters with the same name from your hand, field, and/or GY; change the ATK of all face-up monsters your opponent currently controls to 0, until the end of your next turn.

Mergemidon Nerites
Level 4 EARTH Insect/Effect
1600/1300
If an Insect monster(s) you control is destroyed by card effect (except during the Damage Step): You can Special Summon this card from your hand. During your Main Phase: You can activate this effect; destroy this card, and if you do, Special Summon 2 "Mergemidon Nerites" from your Deck in Defense Position, also you cannot Special Summon monsters for the rest of this turn, except Insect monsters. You can only use each effect of "Mergemidon Nerites" once per turn.

Mergemidon Phalanx
Level 4 EARTH Insect/Effect
500/1500
During your Main Phase: You can activate this effect; destroy this card, and if you do, Special Summon 2 "Mergemidon Phalanx" from your Deck in Defense Position, also you cannot Special Summon monsters for the rest of this turn, except Insect monsters. If this card in your GY is banished: You can draw 1 card. You can only use each effect of "Mergemidon Phalanx" once per turn.

Mergemidon Tithonus
Level 4 EARTH Insect/Effect
1500/1500
During your Main Phase: You can activate this effect; destroy this card, and if you do, Special Summon 2 "Mergemidon Tithonus" from your Deck in Defense Position, also you cannot Special Summon monsters for the rest of this turn, except Insect monsters. If this card in your GY is banished: You can inflict 600 damage to your opponent. You can only use each effect of "Mergemidon Tithonus" once per turn.

Mergemidon Shell
Equip Spell
Activate this card by targeting 1 "Mergemidon" monster in your GY; Special Summon it, and if you do, equip this card to it. It gains 500 ATK. If this card is sent to the GY because the equipped monster was destroyed by card effect and sent to the GY: Inflict 500 damage to your opponent. You can only use this effect of "Mergemidon Shell" once per turn. You can only activate 1 "Mergemidon Shell" per turn.

Mergemidon Shield
Normal Trap
Target 1 "Mergemidon" Switch Monster you control; equip it with this card. Your opponent cannot target the equipped monster with card effects, also it cannot be destroyed by your opponent's card effects. You can banish this card from your GY, then target 3 of your banished Insect monsters; return them to the GY. You can only use this effect of "Mergemidon Shield" once per turn.

Mergemidon Nest
Quick-Play Spell
If you Normal or Special Summon a Switch Monster(s): Target 1 card on the field; destroy it, then, if you Switch Summoned a monster, draw 1 card. You can only activate 1 "Mergemidon Nest" per turn.

Mergemidon Exoskeleton
Continuous Spell
When this card is activated: You can add 1 "Mergemidon" monster from your Deck to your hand. During your Draw Phase, before you draw: You can give up your normal draw this turn, and if you do, add 1 of your "Mergemidon" cards that is banished, in your Deck or GY, to your hand, except "Mergemidon Exoskeleton". You can only activate 1 "Mergemidon Exoskeleton" per turn.

Mergemidon Molting
Counter Trap
When your opponent activates a Spell/Trap Card or monster effect: Destroy 1 "Mergemidon" monster you control, and if you do, negate the activation, and if you do that, destroy that card. You can only activate 1 "Mergemidon Molting" per turn.