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How to Unlock Rumble Horn Sword Skill | Echoes of Aincrad (SAO EoA)

How to Unlock Rumble Horn Sword Skill | Echoes of Aincrad (SAO EoA)

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

Rumble Horn Basic Information

Rumble Horn
Weapon TypeRapier icon
Rapier
SP Cost80Cooldown70
DescriptionExecute four swift, wide-range thrusting Crush Attacks dealing: ・60 (+2000% of ATK) on the first strike
・60 (+200% of ATK) on the second strike
・60 (+200% of ATK) on the third strike
・130(+200% of ATK) on the fourth strike

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

How to Unlock Rumble Horn 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.

Rumble Horn is unlocked by Rapier Proficiency Lv. 7.

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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