War of the Spark Draft Booster has variants:
Explore this pack in Sealed.

Sheets

Sheet basic

At rate 1/15 (6.67%)

Sheet common (color balanced)

At rate 1/101 (0.99%)

Sheet nonplaneswalker_uncommon

At rate 1/60 (1.67%)

Sheet planeswalker_rare_mythic

At rate 2/29 (6.9%)
At rate 1/29 (3.45%)

Sheet foil

At rate 3/580 (0.52%)
At rate 1/320 (0.31%)
At rate 3/1210 (0.25%)
At rate 3/2420 (0.12%)

Sheet planeswalker_uncommon

At rate 1/20 (5.0%)

Sheet nonplaneswalker_rare_mythic

At rate 1/46 (2.17%)
At rate 1/92 (1.09%)