Serpentine Fang

At 1st level, you gain a bite attack dealing 1d8 damage (1d6 for small creatures). Additionally, it can apply a poison, dealing 1 Constitution damage per round for 4 rounds. The DC is equal to 10 + half your bloodrager level + Constitution modifier. At 8th level, the damage increases to 1d2 Constitution damage and the duration increases to 5 rounds. At 16th level, the damage increases to 1d4 Constitution damage and the duration increases to 6 rounds. Additionally, the number of saves needed to cure from the poison increases to 2.