Like most Magic: The Gathering cards, the value of Copy Artifact depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Masters Edition IV)
You may still cast nonland cards by paying their mana costs as normal
Any cards which can utilize a boundless amount of mana strongly encourage you to deploy every last land
The Disney Lorcana D23 Event Announcements Every announcement at the Disney Lorcana D23 live event has been collected into a single post on the D23 website.Senior Brand Manager and Disney Lorcana Co-Designer Ryan Miller opened the event remarking on the game's launch, referring to it as "a roller-coaster on a rodeo." Miller continued the event citing several notable metrics for Disney Lorcana
Several other spoilers for the upcoming set were revealed in the MTG stream
A mistranslation in the English text omitted the requirement that its Mind Games power only work from the Active spot, effectively allowing it to block an opponents Trainer cards from the Bench