(bug) Negative Aura spectral cards can't give polychrome

[Tetsu]

While copying Aura spectral cards with Perkeo and using those negative Aura copies on a bunch of steel aces, I noticed that they seem unable to give polychrome.

I used negative auras on steel aces 20~25 times, only got foil and holographic - when I noticed the bug I ended up using aura on another card, and only then got polychrome on that card (using the original, non-negative aura).

I might just be super unlucky rolling 66% over 20 times in a row, but this seemed bugged to me.
Jokers: Perkeo, Perkeo, Blueprint, Fortune Teller, Mime

[Juski]

The odds aren't 33% to get Polychrome from Aura or Wheel of Fortune, it's far far less. The odds are heavily favored for Foil, you should have seen a lot more of them than Holographic too.

With that said, not getting a single Polychrome in 20-25 is somewhat unlucky, but not uncommon

[Goblin]

Początkowo opublikowane przez Juski:

The odds aren't 33% to get Polychrome from Aura or Wheel of Fortune, it's far far less. The odds are heavily favored for Foil, you should have seen a lot more of them than Holographic too.

With that said, not getting a single Polychrome in 20-25 is somewhat unlucky, but not uncommon

Pretty sure the function used to determine edition for Aura is the same one as WoF, in which case it's 50% Foil, 15% Polychrome, and 35% Holographic. Failing to roll a polychrome 25 times in a row with those odds happens 1.72% of the time, and for just 20 times it's 3.88%.
Still somewhat unlikely, but a lot more likely than if it were 33% chance for Poly which already goes to 0.02% chance to never get it at 20 rolls.