Lswarm

Verz is an archetype of DARK-Attribute monsters which was introduced in Duel Terminal - Sacred Star Knights!!. Their most significant feature is that their ATK/DEF end with 50. Despite being released prior to this one, the "Steelswarm" archetype (which is known as "Inverz" in the OCG) is a sub-archetype of this one. Thus, all "Steelswarm" monsters are supported by "Verz" support cards.

Some of the monsters in this archetype are DARK counterparts of other Duel Terminal-released monsters, apparently corrupted by the virus of the "Steelswarm", which was released from "Steelswarm Cell" as shown in the artwork of "Invasive Violating Infection". A good example is the Xyz Monster "Verz Bahamut", which is the counterpart of "Brionac, Dragon of the Ice Barrier". Possibly, this plague also destroyed the Steelswarms themselves, as the only true "Steelswarm" to be released since has been "Steelswarm Roach".

The strategy of the "Verz" seems to be similar to the "Steelswarm", taking field advantages with powerful beatsticks backed up by removal effects, as well as punishing your opponent for Special Summoning mid-to-high Level monsters but with the added twist of taking control of your opponent's monsters.

Relationship
Evidently, this archetype share a close name with "Steelswarm" (Inverz, インヴェルズ), an archetype from the previous Duel Terminal story arc. They both consist of also DARK-Attribute monsters. Furthermore, the "Inverz" could be seen as a shortened version of "Insect Verz" or "Insectoid Verz", meaning the "Verz" virus might have come long before the "Steelswarm" did, and the "Steelswarms" are a heavily-infected species of creature. Even the "Verz" symbol can be seen as an outline of "Steelswarm" symbol (best seen under the chest of "Verz Bahamut").

It is also possible that "Steelswarm Roach" escaped the destruction of its comrades by the hands of the "Vylons". Then, it reached the first Duel Terminal World and spread the "Verz" virus there, explaining how the "X-Sabers", "Ice Barriers" and "Dragunities" are infected.