Coin of Fate

This simple silver coin represents the dual paths that face all adventurers: glory or defeat. Victory
or death. Once per day, a flip of this coin, which consumes a bonus action:
{1} "Heads" (yes) the coin bursts like a firework, granting you and all allies advantage on a roll of their choice on a turn of their choice
{2} "Tails" (no) the coin emits a noxious odor. You and all allies are at disadvantage on a roll and turn of GM's choice