Lighning Breath (Demon Slayer Campaign)

Lightning Breathing derived from Thunder Breathing, but has very many signinficant changes. First, it is used only with longbows (yumi) and shortbows. It also has very few forms (katas):

First Form: Sky Lightning. As an action, while using your Breath Style, you can fire an arrow from your bow, which increases it`s range for 50ft. Additionally, the attack is made with advantage, as the arrow flies at blinding speed. When hit, the target takes extra 1d4 lightning damage. You can use this a number of times equal to your proficiency bonus. The extra damage increases to 2d4 at level 5, 3d4 at level 10 and 4d4 at level 15. 

Second Form: Raikou (avaliable from level 15). As an action, while using your Breath Style, you can fire an arrow from your bow, which does extra 3d6 lightning damage, you also don`t need to make an attack roll, but the target needs to make a Dexterity saving throw.

The katas of Breath of Lightining can be used a limited number of times, as shown at the Breath Style Table:

Character level       Number of uses

1                                1

2                                2 

3                                3

4                                3

5                                3

6                                3

7                                4   

8                                4 

9                                4

10                              4

11                              5 

12                              5

13                              5

14                              5

15                              6 

16                              6

17                              6

18                              6

19                              6

20                              7