Rogues are just not good enough and also very wonky
Number 188 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Pioneer, Standard Rulings (11/10/2020) To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Blasphemous Act)
Spirit with Eyes of Blue also has an effect that lets you tribute itself to Special Summon a Blue-Eyes monster from your hand or GY
Any red deck can make room for a copy there aren't many games where you wont have a good opportunity to fire this off, efficiently answering a creature or artifact
Usually, by the end of set design, you're playtesting once a week or more