War of the Spark Theme Booster Red 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 4/33 (12.12%)
At rate 2/33 (6.06%)
At rate 1/33 (3.03%)