Vulnerability
Source: D&D 5.2 SRD Rules Glossary
If you have Vulnerability to a damage type, damage of that type is doubled against you. Vulnerability is applied only once to an instance of damage. See also "Playing the Game" ("Damage and Healing").
Source: D&D 5.2 SRD Rules Glossary
If you have Vulnerability to a damage type, damage of that type is doubled against you. Vulnerability is applied only once to an instance of damage. See also "Playing the Game" ("Damage and Healing").