The Magic Librarities

I was curious levels of rarity...

ALT Art weatherlight Crew vs Expeditions vs Kaladesh Inventions

Are those all the same rarity? and if so 1 in how many packs/boxes?

This article seems to indicate 1:144 packs for inventions:
http://magic.wizards.com/en/articles/ar ... 2016-09-12

Imho you cannot compare inventions and expedition with the weatherlight crew, since the crew came in different languages and only in english a normal and a alternate Foil version exist, while the other languages had just the alternate Foil version, so it was just a simple foil rare, not more rare than any other foil rare in the set.

Depending on the purpose of your inquiry, are you looking for how likely you are to open such card in a pack, or are you looking for how many copies are available in the world.

For the latter, you would need to know the print run size of each set.

Tav

Looking at comparing odds of opening each of the promos...think looking at Planeshift, it would be much rarer due to print runs increasing year to year.

As an aside, think they should make foreign language variants of each promo. I order a lot of foreign boxes, and the idea of hitting the jackpot is quite appealing. So is keeping my deck all one language (Japanese). Though think about popping JP Foil Mana Vault, idea of winning a down payment on a car is amazing. Or trade for a Mox/Lotus. Would be perhaps the only owner of said card in the USA. I like that idea.