March of the Machine: The Aftermath Arena Booster has variants:
Explore this pack in Sealed.

Sheets

Sheet basic_or_gainland

At rate 1/10 (10.0%)
At rate 1/20 (5.0%)

Sheet sfc_common (color balanced)

At rate 1/101 (0.99%)

Sheet sfc_uncommon

At rate 1/50 (2.0%)

Sheet dfc_common_uncommon

At rate 1/10 (10.0%)
At rate 1/20 (5.0%)

Sheet uncommon_battle

At rate 1/20 (5.0%)

Sheet sfc_rare_mythic

At rate 1/49 (2.04%)
At rate 1/98 (1.02%)

Sheet multiverse_legend

At rate 4/155 (2.58%)
At rate 2/155 (1.29%)
At rate 1/155 (0.65%)

Sheet aftermath_card

At rate 1/30 (3.33%)
At rate 1/60 (1.67%)
At rate 1/120 (0.83%)

Sheet rare_mythic_battle

At rate 2/27 (7.41%)
At rate 1/27 (3.7%)

Sheet dfc_rare_mythic

At rate 2/15 (13.33%)
At rate 1/15 (6.67%)