Weapon and Armor Proficiency: Naga overlords gain no proficiency with any weapon, armor, or shield.

Spells per Day/Spells Known: When a new naga overlord level is gained, the character gains new spells per day (and spells known, if applicable) as if he had also gained a level in whatever arcane spellcasting class he had (or could cast spells as) before he added the prestige class. He does not, however, gain any other benefit a character of that class would have gained (bonus metamagic or item creation feats, bard or assassin abilities, and so on), except for an increased effective level of spellcasting. This essentially means that he adds the level of naga overlord to the level of whatever other arcane spellcasting class he had, then determines spells per day, spells known, and caster level accordingly.

If a character had more than one arcane spellcasting class before he became a naga overlord, he must decide to which class he adds each level of naga overlord for the purpose of determining spells per day and spells known.

Enslave (Su): A naga overlord can attempt to enslave any one living creature within 30 feet. The target must succeed on a Will save (DC 10 + 1/2 naga overlord's character level + naga overlord's Cha modifier) or be affected as though by a dominate person spell (caster level equals naga overlord's arcane caster level). An enslaved creature obeys the naga overlord's telepathic commands until freed by remove curse, and it can attempt a new Will save every 24 hours to break free. The control is also broken if the naga overlord dies or travels more than 1 mile from its slave.

This ability is usable once per day at 1st level, twice per day at 4th level, and three times per day at 7th level.

Augment Followers I (Su): The naga overlord can augment the abilities of its followers. The following spells automatically function as if affected by the Extend Spell feat when cast by a 2nd-level or higher naga overlord: bear's endurance, bull's strength, cat's grace, eagle's splendor, fox's cunning, mass bear's endurance, mass bull's strength, mass cat's grace, mass eagle's splendor, mass fox's cunning, mass owl's wisdom, and owl's wisdom. These spells do not occupy higher spell slots or require additional casting time.

Tap Slave (Su): At 3rd level, a naga overlord can leech the lifeforce of any one enslaved follower within 1 mile as if using the vampiric touch spell (caster level equals naga overlord's arcane caster level), except that he need not actually touch the target. This ability is usable once per day at 3rd level, twice per day at 6th level, and three times per day at 9th level. Augment Followers II (Su): The range of the following spells automatically becomes close (25 ft. + 5 ft./2 levels) when they are cast by a 5th-level or higher naga overlord: bear's endurance, bull's strength, cat's grace, eagle's splendor, fox's cunning, mass bear's endurance, mass bull's strength, mass cat's grace, mass eagle's splendor, mass fox's cunning, mass owl's wisdom, and owl's wisdom.

Augment Followers III (Su): The following spells automatically function as if affected by the Extend Spell feat when cast by an 8th-level or higher naga overlord: bear's endurance, bull's strength, cat's grace, eagle's splendor, fox's cunning, mass bear's endurance, mass bull's strength, mass cat's grace, mass eagle's splendor, mass fox's cunning, mass owl's wisdom, and owl's wisdom. These spells do not occupy higher spell slots or require additional casting time.

Enslave Monster (Su): A t 10th level, a naga overlord's enslave ability functions like dominate monster rather than dominate person.