Fire Mastery

Fire Mastery is a Field Skill in Xenoblade Chronicles 2. It can be found on common, rare or legendary Fire Blades alike. Common Blades with the Fire element are guaranteed to have this skill.

Overview
Fire Mastery is one of the easier Field Skills to cover, which is fortunate as it's also one of the more common skills required in Field Skill checks. Six levels are available from guaranteed story Blades (four of which will almost certainly be obtained via regular gameplay), and any further levels required may be covered simply by opening Core Crystals until common Blades with the Fire element are obtained.

While several Field Skill checks which need Fire Mastery are required to advance the story, most of these are effectively tutorials for Field Skills and are guaranteed to be covered by. The exception is a level 3 check in the Spirit Crucible Elpys which is necessary to proceed past the Middle Worm-Ridden Cave, at which point only two levels of the skill are available via guaranteed Blades. For this, it is necessary to use one or two Fire-element common Blades to cover the remainder.