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

Sheets

Sheet uncommon (duplicates allowed)

At rate 4/57 (7.02%)
At rate 1/57 (1.75%)

Sheet common (duplicates allowed)

At rate 2/41 (4.88%)
At rate 1/82 (1.22%)

Sheet rare_mythic

At rate 4/35 (11.43%)
At rate 2/35 (5.71%)
At rate 1/35 (2.86%)