It required us to rethink how a Magic set is made
six for the reprints
The Lorcana starter decks provide counters and mats for these purposes, but you can use any method you like as long as it's been agreed with your opponent
Colorless: Skullclamp, Ichor Wellspring, Mishras Bauble, Mask of Memory, etc
Freyalise, Llanowar's Fury restricts you to mono-green, but its another elf deck option, and you can also use it to demystify the whole planeswalker in the command zone thing
The final ability gives you an emblem that says, Whenever an Artifact is put into your graveyard from the battlefield, return that card to the battlefield at the beginning of the next end step. This basically gives you an undying battlefield of absurd Artifacts, and its incredibly potent