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Causes Thunder damage to the enemy.
Thunder Blade (サンダー剣, Sandā Ken?), also known as Thunder Slash (雷鳴剣, Raimeiken?), Thunder Sword, Stormblade, Lightning Blade, Bolt Sword, or simply Thunder or Bolt, is a recurring ability in Final Fantasy. It is always a Lightning-elemental attack to one target, and is mainly attributed with the ability Spellblade.
Thunder Blade is a Command Materia and ability. Zack lifts his sword then cleaves it from left to right, dealing small physical damage and the Thunder spell to a enemy. Thunder Blade does moderate damage against Water-based enemies. It is a Level 1 Command Materia. It can be stolen from Crescent Unit Aqua.
There is a Sword Art that can be used by Steiner called Thunder Slash, which is supposed to deal Lightning-elemental damage equal to 19% of one target's HP, costing 24 MP, but due to a glitch, it misses almost every time. Thunder Slash can be learned for 30 AP by the Defender and Ragnarok. Thunder Slash will never work on bosses. The ability is also part of Beatrix's Seiken command.
The damage formula for Thunder Slash is as follows:
Bolt Sword is learned by Gladiators and deals Lightning-elemental damage to one target. It is learned from the Air Blade for 200 AP, and costs 10 AP. Bolt Sword has a Weapon Attack Power of 54 and is also susceptible to Absorb MP.
Thunder Assault is an ability of the Gladiator, learned for 300 AP through the Air Blade and having a range of 1, costing 4 MP to use.
Deals lightning damage to a single enemy.
Thunder Slash appears as a Fusion Ability for both the Warriors of Light and the Warriors of Darkness. In order to learn the ability, it requires the user to have both the Thunder and Strike abilities equipped during battle. The ability deals lightning-elemental damage to a single enemy and costs 9 MP to use.
In addition, Arcing Slash appears as an ability of the Magic Blade skillset, available through the Red Mage class. It costs 8 MP to use and deals Lightning-elemental physical damage to one target.
Lightning damage to one enemy
Thunder is the sound caused by lightning. Depending on the distance and nature of the lightning, thunder can range from a sharp, loud crack to a long, low rumble (brontide).
Lightning is a sudden electrostatic discharge during an electrical storm between electrically charged regions of a cloud (called intra-cloud lightning or IC), between that cloud and another cloud (CC lightning), or between a cloud and the ground (CG lightning).