The Brothers' War Collector Booster has variants:
Explore this pack in Sealed.

Sheets

Sheet foil_fullart_basic

At rate 1/10 (10.0%)

Sheet foil_common

At rate 1/101 (0.99%)

Sheet foil_uncommon

At rate 1/80 (1.25%)

Sheet foil_rare_mythic

At rate 2/149 (1.34%)
At rate 1/149 (0.67%)

Sheet extended_rare_mythic

At rate 2/125 (1.6%)
At rate 1/125 (0.8%)

Sheet extended_commander_jumpstart

At rate 1/29 (3.45%)
At rate 1/58 (1.72%)

Sheet brr_retro_artifact_uncommon

At rate 1/18 (5.56%)

Sheet brr_schematic_rare_mythic

At rate 2/75 (2.67%)
At rate 1/75 (1.33%)

Sheet foil_brr_retro_artifact_schematic_uncommon

At rate 5/108 (4.63%)
At rate 1/108 (0.93%)

Sheet transformers

At rate 1/16 (6.25%)
At rate 1/112 (0.89%)

Sheet foil_alt_art

At rate 1/120 (0.83%)
At rate 1/144 (0.69%)
At rate 1/240 (0.42%)
At rate 1/288 (0.35%)
At rate 1/720 (0.14%)
At rate 1/1440 (0.07%)

Sheet double_rainbow_serialized

At rate 4/147 (2.72%)
At rate 2/147 (1.36%)
At rate 1/147 (0.68%)

Sheet foil_transformers

At rate 1/16 (6.25%)
At rate 1/112 (0.89%)

Sheet brr_schematic_uncommon

At rate 1/18 (5.56%)

Sheet brr_retro_artifact_rare_mythic

At rate 2/75 (2.67%)
At rate 1/75 (1.33%)