"Steamroid" + "Drillroid" + "Submarineroid" A Fusion Summon of this card can only be conducted with the above Fusion Material Monsters. During battle between this attacking card and a Defense Position monster whose DEF is lower than the ATK of this card, inflict the difference as Battle Damage to your opponent.
All of its materials are low-level for one. Expressroid and Vehicroid Connection Zone are factors, too. And while the 'roids aren't exactly broken, Steamroid, Drillroid and Submarineroid are all better cards than Ancient Gear Knight, the best low-level Ancient Gear.
I can't believe they give us 3 vehicroid Connection Zone but one Super Vehicroid monster.