Dup maps with anvil

I decided to craft a few cards to frame them, but decided to rename them in case my friends took them and randomly found a bug on the dup.

To complete the bug, you need to craft several cards, put all the cards in the anvil and change the name to any, use the Shift keys to pick up the cards. Anvil takes 1 card with the old name and can issue up to a stack of cards with a new name, all cards are usable.