Masters Edition IV Magic Online Booster has variants:
Explore this pack in Sealed.

Sheets

Sheet basic

At rate 1/12 (8.33%)

Sheet common (color balanced)

At rate 1/80 (1.25%)

Sheet uncommon

At rate 1/72 (1.39%)

Sheet rare_mythic

At rate 1/105 (0.95%)

Sheet foil

At rate 3/460 (0.65%)
At rate 1/288 (0.35%)
At rate 1/700 (0.14%)