Rakdos Charm

D&D 2014 boon: Rakdos Charm. Source: Guildmasters' Guide to Ravnica. boon type Charm When you activate this charm, you can cast the crown of madness, hellish rebuke, or shatter spell. The charm vanishes after you activate it.

Source: Guildmasters' Guide to Ravnica, p. 174 - Licenses and attribution