(Disclaimer: I did not write this, no copyright infringement etc. intended, I just want to let everyone know the powers of Inzektors)
Inzektors as a Deck are very combo-orientated, relying on three specific cards to get their plays going to start raking in the card advantage. "Inzektor Dragonfly" and "Inzektor Centipede" are the crutches to fully utilizing the destructive power of "Inzektor Hornet"! Together with several support cards, these cards are capable of tearing down entire fields in a single turn and then OTKing mercilessly. But how do they do it? Firstly, let's take a look at "Hornet"'s effects.
"Inzektor Hornet" is a Level 3 DARK Insect-Type monster. Once per turn, it allows you to attach another "Inzektor" monster from your hand or Graveyard straight to it, and when it becomes attached to its Insect brethren, it boosts their ATK/DEF and Level! But its true powers come into play with its last and most ruthless effect - when "Inzektor Hornet" is equipped, by sending it to the Graveyard, you can destroy 1 card on the field. A pretty useful effect, but it gets better.
Both "Inzektor Dragonfly" and "Inzektor Centipede" are also capable of attaching their Insect-Type family members to themselves. When combined with "Hornet", they unleash the combo that has secured the Inzektors' place in the high tiers.
When "Hornet" is sent to the Graveyard while attached to "Inzektor Dragonfly", not only do you get to destroy 1 card, but "Dragonfly"'s effect allows you to Special Summon another "Inzektor" monster from your Deck straight to the field. By summoning "Inzektor Centipede", you can reattach "Hornet" and then send it back to the Graveyard to immediately destroy another card! "Centipede" then allows you to search for a 2nd "Inzektor Dragonfly" and add it to your hand to use the turn after, allowing you to loop the combo several times.
Due to the nature of the combo, this deck relies heavily on draw power, as well as cards that send "Inzektor Hornet" to the Graveyard. Being DARK, Inzektors have access to "Allure of Darkness" for draw power and "Armageddon Knight" for dumping. Other options include the ever-popular "Pot of Duality" and "Foolish Burial".
"Inzektor Giga-Mantis" is used to make an OTK situation easier to accomplish, while boosting the ATK of your "Inzektor" to a respectable 2400. With the main "Inzektor" monsters being Level 3, they are also able to create the most popular Xyz Monsters, including "Number 17: Leviathan Dragon" and "Number 20: Giga-Brilliant", while the Level-changing effects of "Hornet" can be used to create rare but powerful Rank 6 monsters like "Photon Streak Bouncer". With "Inzektor Hornet" paving the way, this deck finishes off the opponent with big beaters, including "Dark Armed Dragon" and "Black Luster Soldier - Envoy of the Beginning".
With their ability to bounce back from the infamous Wind-Up loop, and forcing "Evolzar Laggia"'s hand, little is left to wonder why this deck has gained a strong foothold in both the OCG and TCG. Make no mistake - left unprepared, Inzektors can and will decimate even the top of the top tier.