Making Auras cost three less is quite the discount, and helps enable Enchantress decks to storm off by cantripping off of their Auras when they have Enchantress creatures in play
The idea that somehow this clever little vein of design space hasn't been tapped is a euphoric one
There was plenty of experimentation with these ultra-rare versions of cards for a while, and Wizards of the Coast landed on a Headliner system, where one card from a new release gets the royal treatment as the signpost card of the set, complete with extremely rare serialized versions found only in collector boosters
Retrieved 20 December 2021
These Japanese Booster Boxes are praised widely for their unique pull rates and often feature different rarities and print runs compared to their English counterparts
Its not very robust since it requires you to have Ral on the battlefield and two of the same card (Expansion in your hand, but it was especially fun when you pulled it off by copying an opponents spell