Shadows over Innistrad Draft Booster has variants:
Explore this pack in Sealed.

Sheets

Sheet basic

At rate 1/15 (6.67%)

Sheet sfc_common (color balanced)

At rate 1/101 (0.99%)

Sheet sfc_uncommon

At rate 1/80 (1.25%)

Sheet sfc_rare_mythic

At rate 2/121 (1.65%)
At rate 1/121 (0.83%)

Sheet dfc_common_uncommon

At rate 1/12 (8.33%)
At rate 1/30 (3.33%)

Sheet foil

At rate 1/200 (0.5%)
At rate 1/400 (0.25%)
At rate 3/1360 (0.22%)
At rate 3/2720 (0.11%)

Sheet dfc_rare_mythic

At rate 2/15 (13.33%)
At rate 1/15 (6.67%)