Alara Reborn has variants:
Explore this pack in Sealed.

Sheets

Sheet common

At rate 1/60 (1.67%)

Sheet uncommon

At rate 1/40 (2.5%)

Sheet rare_mythic

At rate 1/40 (2.5%)
At rate 1/80 (1.25%)

Sheet foil

At rate 1/100 (1.0%)
At rate 1/160 (0.63%)
At rate 3/800 (0.38%)
At rate 3/1600 (0.19%)