These artifacts have built-in medallion effects, allowing spells of the corresponding colour to cost one less mana to cast
Illustrated by Jung Park Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Not Legal Comp
PSA 10 Flapple #186 VMax Climax S8B Japanese Pokemon card In rare cases, the certificate may differ
Turn it face up any time for its mana cost if it's a creature card.) Whenever you attack with creatures with total power 6 or greater, you may turn a face-down creature you control face up
Finally, "Duza the Meteor Cubic Vessel" is an important piece of support: it is a Normal Summonable Machine that sends a "Cubic" card to the GY, either sending "Vijam" so the above monsters can summon it, or the "Cubic" Spells/Traps for their GY effect
But a PSA 10 meant it was worth $140,000$200,000 plus