Hit Dice (d12) D&D 2014

Hit Dice: 1d12 per barbarian level (SRD 5.1 p.8). Hit Points at 1st Level: 12 + your Constitution modifier. Hit Points at Higher Levels: 1d12 (or 7) + your Constitution modifier per barbarian level after 1st. A character can spend one or more Hit Dice at the end of a short rest, up to the character's maximum number of Hit Dice, which is equal to the character's level. For each Hit Die spent in this way, the player rolls the die and adds the character's Constitution modifier to it. The character regains hit points equal to the total. The player can decide to spend an additional Hit Die after each roll. A character regains some spent Hit Dice upon finishing a long rest (p.87).