Greater Mark of Storm
Source: Eberron: Forge of the Artificer p. 45
Prerequisite: 4th
You gain the following benefits.
Ability Score Increase. Increase one ability score of your choice by 1, to a maximum of 20.
Improved Intuition. When you use the Windwright’s Intuition benefit of your Mark of Storm feat, you can roll dice:1d6|noform|noparens|avg (1d6) instead of dice:1d4|noform|noparens|avg (1d4).
Improved Storm. When you use the Storm Magic benefit of your Mark of Storm feat to cast Gust of Wind without a spell slot, you also gain a Fly Speed of 60 feet for the duration of the spell.