Obviously, this is not a completed experiment
A few things I kept in mind for this were possible sources of mana and which color had more direct affinity for artifacts or Equipment
The question of whether Pokmon pull rates are getting worse is relevant context - One Piece has had similar community discussions about pack weighting, though the data is less extensively documented than Pokmon's
Card Name Mana Cost Type Enchantment Rarity Rare rules Text As this enchantment enters, choose Mirran or Phyrexian.* Mirran - Whenever you cast an artifact spell, create a 1/1 colorless Myr artifact creature token.* Phyrexian - At the beginning of your end step, draw a card, then discard a card
Similarly, a graded copy going for $20,000 is more than enough data for some charts to think that Black Lotus just spiked
Lotus Petal Even chopping a Black Lotus into thirds cant make it all that fair, as Lotus Petal is still a very powerful card