Innate Spellcasting. The yuan-ti blood warrior’s spellcasting ability is Charisma (spell save DC 14, +8 to hit. The yuan-ti can innately cast the following spells, requiring no material components:

• At will: animal friendship (snakes only), poison spray
• 3/day each: summon beast (will summon a Swarm of Venomous Snakes
• 1/day each: fire shield, suggestion

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

Multiattack. The yuan-ti makes two melee attacks with its glaive.

Magic Glaive. Melee Weapon Attack: +9 to hit, reach 5 ft., one target. Hit: 4 (1d10 + 7) slashing damage.  A creature hit by this attack must make a CON saving throw or take an additional (1d4) poison damage and will suffer the poisoned condition until the end of its next turn.

Firebolt. Ranged Spell Attack: +8 to hit, range 80/320 ft., one target. Hit: 4 (2d10) fire damage.