Thoron

"Superior magic used to attack with lightning."

- In-game description, Shadow Dragon and Shin Monshō

Thoron (トローン Torōn, also known as Tron in some fan translations) is a powerful Thunder Magic spell in the Fire Emblem Series. This spell essentially serves as a class buster against Dragon tribe Laguz in the Tellius Series, where its high Might and Hit Rate allows it user to inflict copious amounts of damage upon them with the utmost precision.

Although this tome is slightly more expensive than its counterparts Bolganone and Tornado in terms of its Cost Per Use, its Might is considerably higher than both variants.

The Thoron tome is also known as Lightning (ライトニング Raitoningu) in TearRing Saga: Utna Heroes Saga.

In Fire Emblem Fates, Thoron is the personal tome of the avatar from Fire Emblem: Awakening; Robin. It can only be obtained by scanning the Robin amiibo and it cannot be removed from his inventory. However, Thoron replicas are available whenever Robin is manning the armory in My Castle, though they are not as powerful as the original.

Fire Emblem: Ankoku Ryū to Hikari no Tsurugi

 * Thoron
 * Magic
 * 6
 * 21
 * 13
 * 100%
 * 10%
 * 1-2
 * 3
 * 1,950
 * }
 * }

Fire Emblem: Mystery of the Emblem

 * [[File:Thoron icon.png]] Thoron
 * Magic
 * 12
 * 21
 * 12
 * 100%
 * 10%
 * 1-2
 * 3
 * 2,100
 * }
 * }

Fire Emblem: Genealogy of the Holy War

 * [[File:FE4thoron.gif]]Thoron
 * FE4 Thunder.png Thunder
 * A
 * 50
 * 20
 * 70%
 * 1-2
 * 7
 * 12,000
 * }
 * }

Fire Emblem: Thracia 776

 * [[File:FE5thoron.png]] Thoron
 * FE5 Thunder Icon.png Thunder
 * A
 * 10
 * 18
 * 70%
 * 20%
 * 1-2
 * 9
 * 2,200
 * }
 * }
 * }

TearRing Saga: Utna Heroes Saga

 * [[File:Lightning (TS Icon).gif]] Lightning
 * TS Thunder Magic.png Thunder
 * 8
 * 25
 * 9
 * 90%
 * 0%
 * 1-2
 * 7
 * 3,000
 * }
 * }

Fire Emblem: Path of Radiance

 * FE9thoron.gif Thoron
 * FE9 Thunder.png Thunder
 * A
 * 20
 * 10
 * 85%
 * 5%
 * 1-2
 * 7
 * 2
 * 2,200
 * Effective against Dragon tribe Laguz.
 * }

Fire Emblem: Radiant Dawn

 * FE10thoron.png Thoron
 * FE10 Thunder Magic.gif Thunder
 * S
 * 20
 * 9
 * 65%
 * 5%
 * 1-2
 * 7
 * 2
 * 3,200
 * Effective against Dragon tribe Laguz.
 * }

Fire Emblem: Shadow Dragon and Fire Emblem: Shin Monshō no Nazo ~Hikari to Kage no Eiyū~
* Shadow Dragon only, as weight is negligible in Shin Monshō no Nazo.
 * [[File:FE11thoron.png]] Thoron
 * [[File:FE12 Tome.png]] Tome
 * C
 * 21
 * 13
 * 100%
 * 10
 * 1-2
 * 4*
 * 2
 * 2,100
 * }
 * }

Fire Emblem: Awakening

 * [[File:Thoron FE13.png]] Thoron
 * [[File:TomeIconFE13.png]] Tome
 * B
 * 25
 * 14
 * 65%
 * 10%
 * 1-2
 * 2,200
 * }
 * }
 * }

Fire Emblem Fates

 * Thoron
 * [[File:TomeIconFE13.png]] Tome
 * E
 * Infinite
 * 12
 * 70%
 * 10%
 * 0
 * 1-2
 * 0
 * Locked to Robin. Critical Evade +5, Resistance +3.
 * }
 * }

Fire Emblem: Ankoku Ryū to Hikari no Tsurugi

 * Inventory
 * Gotoh
 * Secret Shop
 * Ch. 17
 * }
 * }

Fire Emblem: Mystery of the Emblem

 * Inventories
 * Book 2: Ellerean • Nyna
 * }

Fire Emblem: Genealogy of the Holy War

 * Dropped
 * Ishtore (Ch. 7) - Provided that Tailto's copy of the tome has not been inherited.
 * Inventory
 * Tailto
 * }
 * }

Fire Emblem: Thracia 776

 * Inventory
 * Eyrios
 * Steal
 * Kempf (Ch. 11) • Eyrios and Kempf (Ch. 16A) • Mueller (Ch. 17A) • Gustav (Ch. 18 • Wolf (Ch. 19)
 * }
 * }

TearRing Saga: Utna Heroes Saga

 * Shops
 * M15 • Rimne
 * }

Fire Emblem: Path of Radiance

 * Treasure
 * Ch. 21 - Chest
 * }

Fire Emblem: Radiant Dawn

 * Bargains
 * Part 3: Ch. 11 • Ch. 13
 * }

Fire Emblem: Shadow Dragon

 * Inventory
 * Gotoh
 * Visit
 * Ch. 14 - Village
 * }
 * }

Fire Emblem: Shin Monshō no Nazo ~Hikari to Kage no Eiyū~

 * Inventories
 * Ellerean • Nyna
 * Event
 * Ch. 19 - End of chapter
 * Online Shop
 * Random selection daily; Only three copies may be purchased at any one time.
 * }
 * Random selection daily; Only three copies may be purchased at any one time.
 * }

Fire Emblem: Awakening

 * Dropped
 * Enemy Valkyrie (Ch. 24)
 * Armories
 * Mount Prism • Conqueror's Whetstone
 * Merchants
 * Demon's Ingle • Plegia Castle • Sage's Hamlet • Kidnapper's Keep
 * SpotPass
 * Nergal • Lyon • Ephraim • Elincia • Sigrun • Sephiran • Gharnef • Alm • Arvis • Sigurd • Seliph • Lilina • Narcian • Selena • Oliver
 * Double Duel
 * Defeat Ricken's Chosen in order to obtain the tome as a reward.
 * }
 * Double Duel
 * Defeat Ricken's Chosen in order to obtain the tome as a reward.
 * }
 * }

Non-Canon Appearances
Thoron is a special move of Robin in Super Smash Bros. for Nintendo 3DS and Wii U. It is the final form of Robin's Standard B move which takes 5 seconds to charge. Thoron appears exactly like it does in Awakening, manifesting as an extremely quick, horizontal bolt of lightning. It can pierce through multiple targets.

Etymology
The Thoron tome is most likely named after the Norse god of Thunder, Thor.