pokemon trading card games scarlet & violet 3.5 (3 Packs) Game TCG Japanese SV1a Triple Beat Booster (3X5 Cards Included) : Toys & Pokemon Trading Card Game SV3.5:

Perhaps it is a mere children's bauble

(Leads to: Veils of Fear, Oubliette) Veils of Fear - Each player loses 2 life unless they discard a card

Sami, Wildcat Captain Notoriously broken affinity for artifacts on anything you cast

They also note differences like the lack of holographic stamps

With other complementary artifact mana sources like Thran Dynamo and Grim Monolith, decks could count on being able to get the kind of mana you'd need to justify packing the cards that would let you use the mana from Metalworker to deliver the knockout blow, and their presence lets you turn that Metalworker mana into permanent giant amounts of mana rather than just a one shot deal