Frankenbug

[Toffee.]

During your Main Phase: You can return this card from the field to the hand. The following effect of "Frankenbug" can only be activated once per turn. During your Main Phase 1, If you control a face-up Insect-Type monster, you can Discard this card: Special Summon 1 Level 6 or lower EARTH or WIND Insect-Type monster from your Deck, but if you do, only that monster can attack this turn. If the Summoned monster is a Normal Monster, it gains 500 ATK until the End Phase.

Playability:
Searchable by Danipon and Gokipon, and playable through Howling Insect; All 3 set this card up.
Makes Saber Beetle playable; No that anyone would play it.
Chainsaw Insect's 2400 is cool and all, but it lets the opponent draw.
Confronting the "C" for an instant 2500 DEF wall.
Grasschopper is playable through this; No, it will not get the boost(I may have to re-word this part of the effect).
Scary Moth can be played though this, but it's likely to hurt you more then it does the opponent(Lacks the surprise factor of Vanity/etc)
Can Summoned Armored Bee for shenanigans.
The incentive to Summon a Normal monster makes things like Empress Mantis and Insect Knight become 2700 and 2400 respectively.
Plus, considering only the Summoned monster can attack for the turn, Xyz/Synchroing etc with the Summoned monster will just outright kill your Battle Phase.
The gimmick tied to it lets you make plays, without the end result being that over-the-top.

So really, Insects could potentially get away with something like this.

[Lonk]

I love how you made it attribute specific so that derpzektors won't abuse it.

[Toffee.]

I love how you made it attribute specific so that derpzektors won't abuse it.

LIGHT Insects are random/bleh.
FIRE Insects; LOLOLOLOL
Numbing Grub is the only WATER Insect.
DARK is Inzektor and a few others, but yes, the former would be an issue.
WIND has a decent number, and some of them actually do something.
EARTH has an over-abundance of Targets.
Level cap was a little obvious, since an E-Tele for, of all cards, the 2800 Metal Armored Bug would be outright silly. Plus, most Insects that are 6 and lower aren't really intimidating.

[Lonk]

LIGHT Insects are random/bleh.
FIRE Insects; LOLOLOLOL
Numbing Grub is the only WATER Insect.
DARK is Inzektor and a few others, but yes, the former would be an issue.
WIND has a decent number, and some of them actually do something.
EARTH has an over-abundance of Targets.
Level cap was a little obvious, since an E-Tele for, of all cards, the 2800 Metal Armored Bug would be outright silly. Plus, most Insects that are 6 and lower aren't really intimidating.

 

This also makes Fruitfly Control more viable.  Such a trolly deck.

[TheTurtleOnceCalledGod]

Play in Naturia to get out Stag Beetle?

Primitive Butterfly for shenanigans?

Summon Traptrix from the DECK, effectively becoming Makyura or MST < Best Application, imo.

[Toffee.]

Summon Traptrix from the DECK

Myrmelo(w/e) is like the only one that ever gets played... Heh.