Blood from Tiamat's fiend-touched dragon cultists.

Abishai Blood can be either injected or imbibed as an action.  The pupils of the imbiber's eyes expand so large they almost swallow the iris and sclera, and the imbiber gains the following benefits for one week.

• Darkvision out to 120 feet that isn't impeded by magical darkness.
• Advantage on saving throws against fear and frighten effects, except those caused by a Frightful Presence ability.
• Disadvantage on saving throws against Frightful Presence abilities.