The vast sky may seem silent at times, but it has a voice and power of its own, rarely heard by mortals upon the ground. Some barbarians learn through ancient rites to speak or sing to the sky, the clouds and wind, forming a primal connection that enables them to call upon the sky's power in times of need. When they rage, the sky's mighty voice fills their body, allowing them to roar with its thunderous power.

The first step to becoming a sky caller is hearing the voice of the sky, first as a faint whisper barely distinct from the sound of wind. Many sky callers discover their path high upon a mountain peak, amid a storm, or while practicing tribal singing or shouting rituals.

Cloud Speaker

At 3rd level when you adopt this path, you learn the language of the sky, a necessary step for any sky caller. You can speak and understand Auran. This feature does not grant you the ability to read or write Auran.

Also, you can speak to the clouds, which relay your messages for you. You can cast the skywrite spell, from Xanathar's Guide to Everything, but only as a ritual.

Sky Shout

Starting at 3rd level, when you enter your rage, or as a bonus action on your turn while you are raging, if you can speak, you can shout with the thunderous force of the sky at a creature within 30 feet of you.

The target must make a Constitution saving throw. On a failure, the target takes thunder damage equal to 1d4 + half your barbarian level, and you choose to either knock the target prone or push the target 10 feet away from you. On a success, the target takes half as much damage and isn't pushed or knocked prone.

The saving throw DC for this feature equals 8 + your Constitution modifier + your proficiency bonus. When you reach 6th level, the range for this feature increases from 30 feet to 60 feet.

Vessel of Resonance

At 6th level, your connection to the great voice of the sky fills your body with a latent magical voice and transforms it into a vessel for this mighty sound. You have resistance to thunder damage, you cannot be deafened, and magic cannot prevent you from speaking.

In addition, when you speak, you can choose to amplify your voice. Each creature you can see within a radius that you choose can easily hear your voice as clearly and crisply as if they were within 10 feet of you. The chosen radius cannot exceed 1 mile.

Skybreaker's Roar

Starting at 10th level, when you target a flying creature with your Sky Shout feature, the range is 150 feet and the target has disadvantage on the saving throw.

In addition, you can use an action on your turn to roar into the sky above, altering the weather with the power of your voice. You change the weather using the same rules as the control weather spell, except you can only do so once, and you can't affect the temperature. You can alter the precipitation and wind by up to two stages up or down, but you can't increase precipitation above stage 4 or increase wind above stage 3. These changes only last for 1 hour.

Once you have altered the weather in this way, you can't do so again until you finish a long rest.

Breath of the Sky

When you reach 14th level, you become able to harness the full power of the sky's true voice. As an action on your turn while you are raging, you can release a mighty booming shout in a 60-foot cone.

Each creature in the area must make a Constitution saving throw. On a failed saving throw, a creature takes thunder damage equal to your barbarian level + your Constitution modifier, is knocked prone, is pushed 20 feet away from you, and is deafened until the end of your next turn. On a successful saving throw, a creature takes half as much damage and isn't pushed, knocked prone, or deafened.

In addition, unsecured objects that are completely within the area of effect are automatically pushed 20 feet away from you by the effect, and the sound of your roar is audible out to 1000 feet.

The DC for this saving throw is the same as for your Sky Shout feature. Once you use this feature, you can't use it again until you finish a short or long rest.