Hearthstone

Hearthstone's powers and abilities

Alf Sign Language: As Hearthstone is deaf and mute he is able to communicate via Alfheim Sign Language. It also happens to be the same as American Sign Language.

Lip-reading: Being deaf, Hearth had to learn how to read lips in order to understand and communicate with other people.

Pinball Skills: Hearth has a talent when it came to pinball.

Rune Magic: Hearth is proficient at rune magic, having been taught to use these powers by Odin himself. With his runes, he can bend the very fabric of the universe, make time slow down, invoke destructive force with Thurizaz or make himself stronger with Uruz. However, the casting of these runes leaves Hearth drained but he is gaining proficiency to stop himself from doing so.

Deafness/Audiokinetic Immunity: While Hearthstone can not hear, his lack of hearing gives him an immunity to sound-based attacks. Such as when he and Sam were hiding from Ratatosk and he was unaffected by the squirrel's screech. This also protected him from Fenris Wolf's taunts, and later the security Nøkks' mournful music at his father's party.

Archery: It is revealed in The Sword of Summer, that Hearth is skilled in archery. We see a limited exhibition of this characteristic when he fights Surt with a toy set of bow and arrows.