Clockwork Knight Link-1 monsters have historically always been used for broken combos, and Clockwork Knight fills this niche perfectly by being an easy-to-make Earth Machine monster
Your win condition of this deck is to summon Z-Metal Tank, and then summon other monsters such as Performapal Silver Claw, Sonata the Melodious Diva, Dark Resonator, and Elemental HERO Burstinatrix, all equipped with the Attack Support skill
Among thePrismatic Secret Rare Overframecards, certain copies will featureserial numbers, making them extremely rare and highly collectible
Darkness | Illustrated by Harold McNeill Fog | Illustrated by Jaime Jones Arachnogenesis | Illustrated by Douglas Shuler Inkshield | Illustrated by Jarel Threat Hey, nerds
This raises the question of why Konami would print a card that is literally not capable of winning a game, at least through its effect