Armor Class 15 ({@item bracers of defense})
Hit Points 127 ({@dice 17d8 + 51}) reduced to 107; subtract 1 for each day that passes during the adventure
Speed 30 ft.
Saving Throws CON +6, WIS +7
Skills Deception +8, Persuasion +8, Religion +7, Stealth +6
Damage Immunities poison
Condition Immunities poisoned
Senses darkvision 60 ft., passive Perception 14
Languages Abyssal, Common, Draconic
Challenge 7
Special Equipment. Ras Nsi wears bracers of defense, wields a flame tongue longsword, and carries a sending stone matched to the one carried by the guide Salida (see chapter 1).
Shapechanger. Ras Nsi can use his action to polymorph into a Medium snake or back into his yuan-ti form. His statistics are the same in each form. Any equipment he is wearing or carrying isn't transformed. He doesn't change form if he dies.
Magic Resistance. Ras Nsi has advantage on saving throws against spells and other magical effects.
Multiattack. Ras Nsi makes three melee attacks, but can use Constrict only once.
Bite (Snake Form Only). Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 5 (1d4 + 3) piercing damage plus 7 (2d6) poison damage.
Constrict. Melee Weapon Attack: +6 to hit, reach 5 ft., one creature. Hit: 10 (2d6 + 3) bludgeoning damage, and the target is grappled (escape DC 14). Until this grapple ends, the target is restrained, and Ras Nsi can't constrict another target.
Flame Tongue Longsword (Yuan-ti Form Only). Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 3) slashing damage, or 8 (1d10 + 3) slashing damage when used with two hands, plus 7 (2d6) fire damage.
ToA, p. 230