Tieflings and Aasimar

Tiefling:

Tieflings are defined by their class levels—they do not possess racial HD. They have the following racial traits.

• +2 Dexterity, +2 Intelligence, –2 Charisma: Tieflings are quick in body and mind, but are inherently strange.
• Darkvision: Tieflings see in the dark up to 60 feet.
• Skilled: Tieflings have a +2 racial bonus on Bluff and Stealth checks.
• Spell-Like Ability: Tieflings can use darkness once per day as a spell-like ability. The caster level for this ability equals the tiefling's class level.
• Fiendish Resistance: Tieflings have cold resistance 5, electricity resistance 5, and fire resistance 5.
• Fiendish Sorcery: Tiefling sorcerers with the Abyssal or Infernal bloodline treat their Charisma score as 2 points higher for all sorcerer class abilities.

• Languages: Tieflings begin play speaking Common and either Abyssal or Infernal. Tieflings with high Intelligence scores can choose any of the following: Abyssal, Draconic, Dwarven, Elven, Gnome, Goblin, Halfling, Infernal, and Orc.

Aasimar:
Aasimar are defined by their class levels—they do not possess racial HD. They have the following racial traits.

• Size: Aasimars are Medium creatures and thus have no bonuses or penalties due to their size.
• Ability Score Racial Traits: Aasimars are insightful, confident, and personable. They gain +2 Wisdom and +2 Charisma.
• Type: Aasimars are outsiders with the native subtype.
• Base Speed: Aasimars have a base speed of 30 feet.
• Languages: Aasimars begin play speaking Common and Celestial. Aasimars with high Intelligence scores can choose from the following languages: Draconic, Dwarven, Elven, Gnome, Halfling, and Sylvan. See the Linguistics skill page for more information about these languages.

• Celestial Resistance: Aasimars have acid resistance 5, cold resistance 5, and electricity resistance 5.

• Skilled: Aasimar have a +2 racial bonus on Diplomacy and Perception checks.

• Spell-Like Ability (Sp): Aasimars can use daylight once per day as a spell-like ability (caster level equal to the aasimar's class level).

• Darkvision: Aasimar have darkvision 60 ft. (they can see perfectly in the dark up to 60 feet.)

 
 Tieflings and Aasimar are the products of the clergy of the gods, born to those who have devoted themselves fully to their deity. 
Clerics and paladins of Sereneth can (5% chance) give birth to an Aasimar, while clerics or blackguards of Beloquin or Arom can give birth to a Tiefling (same chance).