Shapechager. The yuan-ti can use its action to polymorph into a Large snake, or back into its true form. Its statistics are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It doesn’t change form if it dies.

• 1/day: fear

Magic Resiscance. The yuan-ti has advantage on saving throws against spells and other magical effects.

Poisonous skin. Any creature that grapples or hits with a melee attack must succeed on a DC 12 Constitution saving throw or become poisoned for 1 minute and taking 2d4 poison damage at the end of each turn. A poisoned creature no longer in direct contact with you can repeat the saving throw at the end of each of its turns(before taking damage), ending the effect on itself on a success.

Death Fangs. The first time the yuan-ti hits with a melee attack on its turn, it can deal an extra 16 3d10 necrotic damage to the target.

Spellcasting (Yuan-ti Form Only). The Yuan-ti is a 6th-level spellcaster. its spellcasting ability is Charisma (spell save DC 13, +5 to hit with spell attacks). It regains its expended spell slots when it finishes a short or long rest. it knows the following warlock spells:

3rd level (3 slots): Counterspell, Enemies Abound, Vampiric Touch

[b]Shapechager.[/b] The yuan-ti can use its action to polymorph into a Large snake, or back into its true form. Its statistics are the same in each form. Any equipment it is wearing or carrying isn’t transformed. It doesn’t change form if it dies.

[b]Innate spellcasting (Yuan-ti Form Only).[/b] The yuan‑ti’s innate spellcasting ability is Charisma (spell save DC 13). The yuan-ti can innately cast the following spells, requiring no material components:
• At will: animal friendship (snakes only)
• 3/day: suggestion
• 1/day: fear

[b]Magic Resiscance.[/b] The yuan-ti has advantage on saving throws against spells and other magical effects.

[b]Poisonous skin.[/b] Any creature that grapples or hits with a melee attack must succeed on a DC 12 Constitution saving throw or become poisoned for 1 minute and taking [2d4] poison damage at the end of each turn. A poisoned creature no longer in direct contact with you can repeat the saving throw at the end of each of its turns(before taking damage), ending the effect on itself on a success.

[b]Death Fangs.[/b] The first time the yuan-ti hits with a melee attack on its turn, it can deal an extra 16 [3d10] necrotic damage to the target.

[b]Spellcasting (Yuan-ti Form Only).[/b] The Yuan-ti is a 6th-level spellcaster. its spellcasting ability is Charisma (spell save DC 13, [+5] to hit with spell attacks). It regains its expended spell slots when it finishes a short or long rest. it knows the following warlock spells:

Cantrip (at will): [spell]Chill Touch[/spell], [spell]Eldritch Blast[/spell], [spell]Infestation[/spell], [spell]Toll The Dead[/spell]
1st level (4 slots): [spell]Arms of Hadar[/spell], [spell]Hellish Rebuke[/spell], [spell]Hex[/spell]
2nd level (3 slots): [spell]Crown of Madness[/spell], [spell]Hold Person[/spell], [spell]Ray of Enfeeblement[/spell]
3rd level (3 slots): [spell]Counterspell[/spell], [spell]Enemies Abound[/spell], [spell]Vampiric Touch[/spell]

Actions

Multiatack (Yuan-ti Form Only). The yuan-ti makes two attacks: One with its bite and one with its glaive.

Bite. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 6 (1d6+3) piercing damage plus 7 (2d6) poison damage.

+1 Spell Sunder Glaive (Yuan-ti Form Only) Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 (1d10+4) slashing damage (can also attack spells as a reaction with a contested attack roll, twice per long or short rest).

[b]Multiatack (Yuan-ti Form Only).[/b] The yuan-ti makes two attacks: One with its bite and one with its glaive.
[b]Bite.[/b] Melee Weapon Attack: [+5] to hit, reach 5 ft., one target. Hit: 6 ([1d6+3]) piercing damage plus 7 ([2d6]) poison damage.

[b]+1 Spell Sunder Glaive (Yuan-ti Form Only)[/b] Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 7 ([1d10+4]) slashing damage (can also attack spells as a reaction with a contested attack roll, twice per long or short rest).