Inverz are awesome

[Lonk]

Larvae of Inverz
Level 1
DARK
Fiend/Effect
ATK/0 DEF/0

During this turn, when you Tribute Summon an "Inverz" monster using this card as a tribute, you can perform an additional Normal Summon or Set this turn.

Striker of Inverz
Level 3
DARK
Fiend/Effect
ATK/1400 DEF/0

If this card is used as a tribute for the Tribute Summon of an "Inverz" monster, your opponent cannot activate Spell or Trap Cards until the End Phase.

Inverz Eaters
Level 2
DARK
Fiend/Effect
ATK/600 DEF/0

While this card is in your Graveyard, when your opponent activates the effect of a card that targets a Tribute Summoned "Inverz" monster you control, you can negate that card's activation and Special Summon this card.

Inverz Monstra
Level 6
DARK
Fiend/Effect
ATK/2400 DEF/0

When this card is Tribute Summoned with an "Inverz" monster used as a Tribute, discard 1 of your opponent's cards. Those cards cannot be activated or be removed from the Graveyard for the remainder of the duel.

Inverz Gylorz
Level 8
DARK
Fiend/Effect
ATK/3000 DEF/0

You can Tribute Summon this card by tributing 1 "Inverz" monster you control. When this card is Tribute Summoned with an "Inverz" monster used as a Tribute, your opponent cannot activate Trap Cards.

Aggressive Tactics
Normal Spell Card

Tribute 1 "Inverz" monster you control and treat that Tribute as though an "Inverz" monster was Tribute Summoned. Add 1 "Inverz" monster from your Deck to your hand.

Inverz Corruption
Continuous Spell Card

Once per turn, you can discard 1 card your opponent controls. It is treated as an "Inverz" monster and you can Tribute it for the Tribute Summon of an "Inverz" monster.

[Kroama]

The three lower monsters are all really neat, but the two bigger ones are a little op. Try changing monstra's effect to say When this card is Tribute Summoned your opponent discards 1 card at random. That card's effect cannot be activated and it can not be moved from the graveyard for the remainder of the duel.

The biggest guy really just needs to limit himself to negating traps or other monster effects, and if you choose the latter definitely change it to say, Monsters cannot activate their effects except for "Inverz" monsters.

[Bringerofcake]

Both the high level ones need to have "If this card is Tribute Summoned by Tributing an "Inverz" monster" at the beginning of their effects. As it is, Monstra is almost better than Caius.

[Lonk]

Ok. I will change effect conditions.

[.Nu-13]

[b]Larvae of the Inverz :[/b] Gatekeeper of the Inverz is still better. But the card isn't that bad itself, still useful.

[b]Striker of the Inverz :[/b] Walking Cold Wave for Inverz. Awesome

[b]Inverz Eaters :[/b] Free +1. IMO, broken a bit

[b]Inverz Monstra :[/b] It discards even from the field and Deck? If yes, broken.

[b]Inverz Gylorz :[/b] Walking Decree. Again, awesome card

[Bringerofcake]

Discarding is explicitly from the hand. Everything else is sending.

[Lonk]

added 2 Spell Cards.