Its important to look for trends emerging in how subsets of decks will sideboard against you
First is that your opponent has the choice whether to cast those spells or not, getting to decide if it is worth it to give you card
If any of the three were to go to auction, it would represent a literal one-of-a-kind opportunity for any collector lucky enough to snag it
A few notes: Casting a creature for its blitz does not change the total mana value of the card
Final Fantasy Adventure Towns Ishgard, the Holy See, Jidoor, Aristocratic Capital, Lindblum, Industrial Regency, Midgar, City of Mako, and Zanarkand, Ancient Metropolis each have powerful effects with a range of costs
While this is certainly a downside, its one that Rakdos can likely surmount with its current tools