Long Sword

Sprite
Damage 20
Crit 7%
Hit +10%
Value 750 G

Equipped By

Sold In Melmond (1,500 G)
The Long Sword does a little bit more damage than the Dragon Sword, Rune Sword, and Were Sword that you likely found in locked Treasure vaults, but at the cost of 5 Hit Rate and a much lower crit rate. It is a viable Weapon for FIGHTERS and RedMAGES without Silver Swords if you only care about consistent damage, but it's safe to give it a pass.
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Melmond Weapons
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Melmond

The ORB of Earth
Page 1
Sail west to the town of Melmond, where the earth is rotting before your eyes.

Long Sword

Large, double-edged sword.
Damage 20
Crit 7%
Hit +10%
Price 1,500 gil (1,200 gil on Easy)
Value 750 gil (600 gil on Easy)
Sold In Melmond

Equipped By

The Long Sword does a little bit more damage than the Wyrmkiller, Rune Blade, and Werebane that you likely found in locked Treasure vaults, but at the cost of 5 Accuracy and a lower crit rate. It is a viable Weapon for Warriors and Red Mages without Mythril Swords if you like to deal maximum damage, but you can safely skip it as well.

Longsword

Sprite
Attack
13
Accuracy
+50%
Type (Icon)Sword
Evasion Bonus +1% × ((Icon)Sword skill + 1)
Magic Penalty 50%
Value 300 gil
Sold In Bafsk, Salamand (600 G)
Equipped By Leila
Found In Bafsk Cave B1
Dropped By Goblin Prince
The Longsword is a nice upgrade over the Broadsword, but suffers from a significant drop in accuracy. If you can get through the Semitt Falls without one, you can pick one up in the very next dungeon. On the other hand, it's not a terribly expensive weapon, so don't hesitate to buy one if you can afford it.