Japanese Paradise Dragona set, features them, as did the English language set Surging Sparks
Number 153 Language English Legal Formats Commander, Legacy, Pauper, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Pioneer, Standard, Timeless Rulings (12/8/2022) You choose the target for Dread Return before paying any of its costs, so it's not possible to cast it using flashback and bring back one of the creatures you sacrifice
Once again, the mana investment for this card is huge, but since it wins the game upon resolution, its definitely worth it
A deck that focuses on control and disruption would benefit from using Performapal Five-Rainbow Magician, as it can severely limit the opponent's options based on the number of Set cards they have
How we design sets is heavily influenced by the means we package it in boosters
Leyline of the Void used to be a big money card too, and combined with Blood Moon the sideboard alone would be a bit costly