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How to Unlock Sharp Nail Sword Skill | Echoes of Aincrad (SAO EoA)

How to Unlock Sharp Nail Sword Skill | Echoes of Aincrad (SAO EoA)

Last Updated: July 21, 2026 at 1:39 PM
Table of Contents

Sharp Nail Basic Information

Sharp Nail
Weapon TypeSword icon
Sword
SP Cost80Cooldown50
DescriptionExecute three long-range vertical Severing Strikes:
• 50 (+200% of ATK) damage on the first strike
• 70 (+200% of ATK) damage on the second strike
• 90 (+200% of ATK) damage on the third strike

Here is the basic information for the Sharp Nail, showing its weapon type, SP Cost and Cooldown, description, and how to unlock it.

How to Unlock Sharp Nail Sword Skill

sword skill levelling.jpg

Sword Skills, although being named as such, can be for different weapon types such as the rapier, dagger, and so on. Except for the defaults, you can unlock Sword Skills by simply increasing your weapon proficiency.

Sharp Nail is unlocked by Sword Proficiency Lv. 5.

How to Increase Weapon Proficiency

Upon completion of the side quest, “Thrill of the Unknown,” you can increase your proficiency. You can then reallocate your Sword Skill points using your chest at the inn.

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