Air Caste Traits

• Ability Score Increase. Your Dexterity score increases by 2, and your Intelligence score increases by 1.
• Pilot. You are proficient in the Piloting skill.
• Unimpeded Movement. You ignore the movement penalties of nonenhanced difficult terrain.
• Cold Resistance. You have resistance to cold damage. Additionally, you are naturally adapted to high altitudes, as described in chapter 5 of the Dungeon Master’s Guide.

Earth Caste Traits

• Ability Score Increase. Your Constitution score increases by 2, and your Intelligence score increases by 1.
• Acid Resistance. Your skin is hardier than most. You have resistance to acid damage.
• Powerful Build. You count as one size larger when determining your carrying capacity and the weight you can push, drag, or lift.
• Expert Craftsman. You can duplicate other creatures' craftwork. You have advantage on all checks made to produce duplicates of existing objects, such as furniture, heraldry, and weapons, provided that you have an example and the necessary materials and tools.

Fire Caste Traits

• Ability Score Increase. Your Dexterity score increases by 2, and your Strength score increases by 1.
• Tau Training. You are proficient with two weapons of your choice, and in light armor.
• Fire Resistance. You have resistance to fire damage.
• Tau Marksmanship. Attacking at long range doesn’t impose disadvantage on your ranged weapon attack rolls.

Water Caste Traits

• Ability Score Increase. Your Charisma score increases by 2, and your Intelligence score increases by 1.
• Amphibious. You can breathe air and water.
• Swim. You have a swimming speed of 30 feet, and you are naturally acclimated to deep, underwater environments, as described in chapter 5 of the Dungeon Master’s Guide.
• Water Caste Training. You are proficient in your choice of two of the following skills: Insight, Intimidation, Performance, and Persuasion.
• Diplomatic Process. When interacting with a creature such as when bartering or negotiating, you can choose to make Charisma (Persuasion) and Wisdom (Insight) skill checks with advantage for one minute (no action required). Once you use this trait, you cannot use it again until you complete a long rest.
• Extra Language. You learn one extra language of your choice.