This is a bar cube I made for my friend JB. It is based around scry, modality, and legendary matters. The idea is that he can play regular Magic "limited" or Commander Limited.
If Commander Limited is the option then there is a 15 card supplemental addition to the cube as well as a standard set of Commander staples for each player:
1x/player Arcane Signet
1x/player Command Tower
1x/player Sol Ring
1x/player The Prismatic Piper (errata: You can have this as your commander in addition to any other commander regardless of partner so long as your other commander is mono-colored).*
*Designer note: The general idea is to limit commander's to two color combinations so that fixing is not an issue.
replace hidetsugu and kairi with https://scryfall.com/card/afr/226/krydle-of-baldurs-gate
replace rakdos with https://scryfall.com/card/neo/99/hidetsugu-devouring-chaos
replace wild cantor with https://scryfall.com/card/rna/223/collision-colossus
replace sigarda with https://scryfall.com/card/dsk/228/rip-spawn-hunter
replace arvad with https://scryfall.com/card/moc/7/moira-and-teshar
replace rootha or aegar with https://scryfall.com/card/mh2/290/fire-ice
replace lightning Helix with https://scryfall.com/card/clu/198/integrity-intervention
replace Gerrard's Verdict with https://scryfall.com/card/mkm/250/push-pull
add: https://scryfall.com/card/und/75/who-what-when-where-why