more necro cards

Icy Death
Counter Trap Card
If your opponent activates a monster effect that will destroy cards when it resolves: You can discard 1 card; negate the effect, and if you do, that monster's ATK becomes 0, also its effect(s) are negated.

Boulder Mermaid
[Level 4/EARTH/Aqua/Tuner/Effect/1600/0]
For a Synchro Summon of a Synchro Monster whose Tuner monster must be named, you can substitute this card for any 1 Tuner monster. Cannot be used as a Synchro Material, except for the Synchro Summon of a monster that lists a named monster as a Tuner.

Level Pulsar
Normal Spell Card
Activate 1 of the following effects. You can only activate 1 "Level Pulsar" per turn.
● The Levels of all Level 5 or higher monsters you control become 8.
● The Levels of all Level 4 or lower monsters you control become 1.

Hyper Cannon Assault
Counter Trap Card
If your opponent activates the effect of a Special Summoned monster: You can Tribute 1 monster you control; negate the effect, and if you do, banish that card, also, after that, inflict damage to your opponent equal to the Level/Rank of the banished monster x300.

Anarchy of the Monarchs
Continuous Spell Card
You can activate "Monarch" Spell/Trap Cards, and their effects, as if you have no cards in your Extra Deck.

I will become serious now:

Enslavement of the Monarchs
Continuous Spell Card
If you have no cards in your Extra Deck and you Tribute Summon a Level 6 "Monarch" monster, while the monster Tributed for its Tribute Summon is in your Graveyard: Special Summon that monster from your Graveyard.

Final Seal of Destruction
Counter Trap Card
If your opponent would Special Summon a monster: You can discard 1 monster; negate that Summon, and if you do, banish that monster, also neither player can Special Summon monster, or attack with Special Summoned monsters for the rest of the turn.

Harpie Gymnast
[Level 4/WIND/Winged Beast/Effect/1300/1400]
Cannot be Special Summoned. If this card is Normal Summoned, if you control a face-up "Hysteric" Spell/Trap Card: You can add 1 "Harpie" monster from your Deck to your hand, except "Harpie Gymnast".

Wood Would
Counter Trap Card
If your opponent activates a card effect from the hand: You can discard 1 card; negate that effect, and if you do, banish that card, also inflict 1000 damage to your opponent.

Spicy Thread
[Level 4/FIRE/Plant/Effect/1600/0]
Each time cards are banished, inflict 300 damage to your opponent. If this card is banished: You can target 1 of your banished Level 4 or lower monsters, except "Spicy Thread"; Special Summon that target.

Katrina, the Master of Hurricanes
[Rank 4/WIND/Winged Beast/Xyz/Effect/2500/1600]
2 Level 4 WIND monsters
Shuffle to the Deck any monster this card destroys by battle. Once per turn: You can detach 1 Xyz Material from this card; return all face-down Spell/Trap Cards on the field to the hands, and if you do, Special Summon 1 WIND monster from your Deck, whose Level is equal to the number of cards returned to the hand by this effect.

BrioNaCl
Normal Spell Card
Activate this card at the start of your Main Phase 1. This turn, each time cards are added from your Deck to your hand OR monsters are Special Summoned from your opponent's Deck, inflict 500 damage to your opponent.

Morphtronic Raidraptoren
[Level 4/DARK/Machine/Effect/1700/1300]
● While in Attack Position: You can conduct 2 Normal Summons/Sets of "Morphtronic" or "Raidraptor" monsters each turn, not just 1.
● While in Defense Position: Once per turn: You can target 1 other "Morphtronic" or "Raidraptor" monster you control; change its battle position, also after that, Special Summon 1 "Morphtronic" or "Raidraptor" monster from your hand in face-up Defense Position, except "Morphtronic Raidraptoren".