Knowledge equals power, a phrase that in the case of Tetsu is overwhelmingly true only being able to use your Tetsu if you understand the exact workings of the spell.

Leaving the mountain village of Teht you and a dozen other teens who’ve joined the newest adventures draft make you way to a guild to sign into an adventuring party and explore dungeons. As you’re not yet the most proficient in weapons yet you’re currently a Tetsu-magi and can only cast the basic elemental Tetsu having not yet copied any unique Tetsu types from someone else’s grimoire. As the wind grows cold you attempt to warm up the air around you with your Tetsu. Tetsu test: When sending fire Tetsu over the perimeter of your body without burning you or using excessive energy should it cover in a spiral over your body, coat in a cloud of heated air or send the heat through your skin.