..."It is meant to be drafted in 3 packs of 20, with two picks from each pack like in Commander Legends, but the minimum deck size is still 40."
I really liked the idea and the constuction of the above linked cube "Museum of Modern" when I saw it, so I took that idea and made a similar cube from a format close to my heart, 2011-2015 legacy. After enemy fetches, but before the Eldrazi Summer etc. This is when I was playing Legacy competitively and there's a lot of old SCG coverage from the 5K series.
Luckily there's still lots of data from that time on MTGTop8, snagged dozens of lists from over the years for the following archetypes:
ArchetypesThen used that cardpool to make this!
Like in the Museum of Modern, there are some duplicates here to support familiar "constucted-style" decks and 4x each of an iconic card from each color (and two three from blue, because it's Legacy baby!)
4x Swords to Plowshares
4x Force of Will
4x Brainstorm
4x Delver of Secrets
4x Thoughtseize
4x Lightning Bolt
4x Tarmogoyf
+Bonus
4x Wasteland
4x each Fetchland (all 10, total of 40)
3x each ABU Duals (all 10, total of 30)