You have been through the ancient blood ritual which transforms a human into a Yuan-Ti. As a result of this transformation you gain the following features:

Altered appearance The transformation has altered your physical form. You gain patches of scaly skin, a forked tongue, reptilian eyes, altered facial structure, or other features as discussed with your DM.

Darkvision You gain darkvision to a range of 60ft.

Innate spellcasting Your spellcasting ability is Charisma for these spells. You gain the ability to cast the following spells innately, without using material components. 
        At Will  poison spray, animal friendship(snakes only)
        1/day suggestion

Magic Resistance You have advantage on saving throws against spells and other magical effects.

Poison Immunity You are Immune to poison damage and the poisoned condition.