Those who pledge themselves to Yig are gifted boons and powers befitting a servant to the Father of Serpents. Using these gifts, Yig's followers attempt to fulfill his inscrutable goals or their own with cunning, ruthlessness and a gift for manipulation.

Expanded Spell List

The Serpent lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you:

 

Serpent Expanded Spells
Spell Level	Spells
1st	Disguise Self, Silent Image
2nd	Alter Self, Detect Thoughts
3rd	Enemies Abound, Bestow Curse
4th	Arcane Eye, Phantasmal Killer
5th	Geas, Cloudkill

Serpent's Gaze

Beginning at 1st level, you gain the ability to hypnotize a target. Once per short rest, you can force a creature that you can see within 10 feet of you to make a wisdom save with the DC equaling 8 plus your proficiency bonus plus your charisma modifier. On a failed save, the target creature becomes incapacitated.  At the beginning of each turn, the paralyzed creature can choose to repeat this saving throw. On a successful save, the creature is no longer incapacitated. The number of uses per short rest increases by 1 at 5th level, by 2 at 10th level and by 3 at 14th level.

Reptilian Resilience

Your patron has granted you an unnatural resilience. Starting at 6th level, you gain resistance to poison damage and have advantage on constitution saves.

Serpent's Gift

Beginning at 10th level, you can use an action to polymorph into a Giant Constrictor Snake once per short rest. For your stats, see the Monster Manual.

Venomous Aura

Beginning at 14th level, you are constantly surrounded by the dark energies of your patron. Any creature within 20 feet of you that is hit by an attack from you or your allies takes an additional 1d6 poison damage.