The Zephyr Pendant -

Created by a Wizard to protect her Fighter son, this blue and white metal pendant shaped in the artisan's idea of a strong breeze has been coveted by warriors for centuries.

It has two effects:

1. Starting at their 3rd Fighter level, when they activate their Second Wind ability, the dice roll increases from 1d10 to 2d10. Another d10 is added to the ability at their 10th Fighter level (3d10) and one more at their 17th Fighter level (4d10).
2. Starting at their 3rd Fighter level, when they activate their Action Surge ability, their speed increases by 10 feet until the end of their next turn. Another 10 feet is added to this effect at their 10th Fighter level and again at their 17th Fighter level.