Skills

Skills and Tools in Avatar
Note that Arcana is no longer a skill and has been replaced with Mythology. In addition to this, there is a new tool proficiency available to players called the Engineering Kit.

Mythology: Similar to Arcana, Mythology covers a broad range of topics related to anything that is not covered by the Nature skill. This skill is primarily used to identify and understand all forms of bending, but it also covers spirits and the spirit world, as well as stories and fairy tales.

Engineering Kits: Engineering is a new tool proficiency which mostly relates to understanding modern technology such as trains and tanks, and constructing such items. A good knowledge of engineering is needed to grasp complex mechanisms and steam engines.

Access to New Skills and Tools
Because of the above adjustments, some classes may have their options slightly changed. Backgrounds remain largely the same, except that Sage has Mythology instead of Arcana, and Guild Artisans can choose Engineering Kits instead of Artisan's Tools. However, the standard rules for backgrounds apply, and players can swap out skills or tools/languages in a background to better suit their character.
 * Barbarian: (no changes)
 * Bender: Gains Mythology as an option
 * Fighter: (no changes)
 * Monk: Gains Mythology as an option
 * Ranger: Gains Mythology as an option
 * Rogue: Gains Engineering Kits as an option instead of Thieves' Tools