Rest of Dec20

Addling Adder
Level 3 DARK Reptile/Effect
1400/1000
If this card is added from the Deck to your hand: You can reveal this card; Special Summon it. If this card is added from your GY to your hand by a card effect: You can reveal this card; send 1 Reptile monster from your Deck to the GY, except "Addling Adder". You can only use each effect of "Addling Adder" once per turn.

Renegade Spectre
Generation 4 DARK Zombie/Exile/Effect
2300/1500
Once per turn, during the Damage Step, when a Spell/Trap Card, or monster effect, is activated (Quick Effect): You can negate the activation. During the End Phase, if this card is in the GY because it was sent there this turn: You can add 1 Key Spell/Trap from your Deck to your hand. You can only use this effect of "Renegade Spectre" once per turn.

Topaz Locust
Level -4 DARK Insect/Atom/Effect
2600/1000
1 Level 1 or higher Insect monster + 1 Fragment Spell
Once per turn: You can target 1 monster your opponent controls; equip it to this card, and if you do, this card gains ATK equal to the original ATK of that monster. (You can only equip this card with 1 monster at a time with this effect.) Once per turn: You can send 1 monster equipped to this card to the GY; inflict damage to your opponent equal to its original ATK, but this card cannot attack the turn you activate this effect.

Emerald Mantis
Level 4 WATER Insect/Effect
1900/1200
Once per turn, during your Battle Step, if this card battled this turn: You can add 1 Fragment Spell from your Deck to your hand.

Diamond Hopper
Level 7 LIGHT Insect/Effect
2100/2000
If the effect activation of your Insect monster is negated by an opponent's card effect: You can Special Summon this card from your hand. This activation and effect cannot be negated. If this card is Special Summoned: You can add 1 Fragment Spell from your Deck to your hand. You can only use this effect of "Diamond Hopper" once per turn.

Tourmaline Wasp
Level 3 WIND Insect/Effect
800/2100
If you control a Fragment Spell that is in an unused zone on your field, you can Special Summon this card (from your hand) to that zone. You can only use this effect of "Tourmaline Wasp" once per turn. This card can attack directly.

Sapphire Moth
Level 4 FIRE Insect/Effect
1400/800
If you control a Fragment Spell that is in an unused zone on your field, you can Special Summon this card (from your hand) to that zone. You can only Special Summon "Sapphire Moth" once per turn this way. Once per turn: You can Special Summon 1 Level 4 or lower non-FIRE Insect monster from your hand.

Ruby Butterfly
Level -4 FIRE Insect/Atom/Effect
2400/800
1 Level 1 or higher Effect Monster + 1 Fragment Spell
You can target 1 Attack Position monster your opponent controls; destroy it, and if you do, inflict damage to your opponent equal to half its original ATK. This is a Quick Effect, if this card was Atom Summoned using an Insect monster as material. You can only use this effect of "Ruby Butterfly" once per turn.

Aquamarine Cricket
Level 3 WATER Insect/Effect
1200/800
If this card is destroyed by battle and sent to the GY: Destroy the monster that destroyed it. During your opponent's turn (Quick Effect): You can banish this card from your GY; negate the next attack this turn from a monster your opponent controls.

Fulgurating General
Link-3 LIGHT Warrior/Link/Effect
2300/TL T TR
2+ Warrior monsters
You cannot Summon/Set monsters to a zone this card points to. While this card is in the Extra Monster Zone, the ATK of all monsters your opponent controls becomes halved. If this card is destroyed by battle and sent to the GY: You can add 1 Shield Spell/Trap from your Deck or GY to your hand.

Meteor Shogun
Level 9 FIRE Warrior/Synchro/Effect
3000/3000
1 Tuner + 2+ non-Tuner monsters
When this card is Synchro Summoned: You can destroy all cards on the field, except face-up cards with a Shield on them.

Loophole Dragon
Link-2 WATER Sea Serpent/Link/Effect
1700/B L
2 WATER monsters
During your End Phase, if this card is in your GY and you control no monsters in your Main Monster Zone: You can banish 1 Fish, Aqua, or Sea Serpent monster from your GY; Special Summon this card. If this card is Special Summoned from the GY, or Link Summoned: You can draw 1 card. You can only use each effect of "Loophole Dragon" once per turn.

Trench Mariner
Level -5 EARTH/WATER Machine/Impure/Bipolar/Effect
2000/800
2 monsters (1 EARTH + 1 WATER)
Banish any monster destroyed by battle with this card. You can detach 1 material from this card and pay 1000 LP, then target 1 monster your opponent controls; it loses 1000 ATK, also this card gains 1000 ATK. These changes last until the end of this turn.

Grim Gargoyle
Level 3 DARK Zombie/Effect
1200/1800
You can target 1 face-up card you control; you cannot Special Summon monsters from the Extra Deck for the rest of this turn, also, destroy that card, and if you do, Special Summon 1 Zombie Molecule from your Deck. You can only use this effect of "Grim Gargoyle" once per turn.

Tripwire Minefield
Fragment Spell
If a monster in this zone is destroyed by battle and sent to the GY: You can Special Summon 1 Level 4 or lower Insect monster from your hand.