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«Sharp Nail» (シャープネイル, Shāpu Neiru?) is a 3-hit, One-Handed Sword category Sword Skill in Sword Art Online, New ALfheim Online and Project Alicization.


«Sharp Nail» begins with a diagonal slash from the bottom-right to top left, followed by a horizontal slash from left to right.[1] Finally, the skill is ended with another diagonal slash from top-right to bottom-left.[1]

An alternative execution of the skill begins with a nearly vertical slash from the user's left shoulder, hitting the target's right side, after which the sword instantly shoots back into a high position and slashes vertically again, hitting the target's left side, then leaps up again and slashes vertically at the centre of the target.[2]


Instance Description
Light Novel Anime Manga
Progressive Volume 2, Concerto of Black and White, Part 7 N/A After dodging Morte's attack with his axe, Kirito hit Morte with Sharp Nail, reducing his hit points to just a bit above fifty percent.
Progressive Volume 3, Barcarolle of Froth, Part 8 N/A Having knocked Kirito's «Anneal Blade» backward, a Forest Elven Inferior Knight activated Sharp Nail, but Kirito used his sword to block all three attacks with a two-handed block, leaving the knight open for Kirito's counterattack with Horizontal Square.
Volume 2, Red-Nosed Reindeer, Part 1 N/A N/A Kirito used this skill against an ant in the Ant Hill on the 46th Floor, killing the ant.
Volume 9 Chapter 1 Part 4 Kirito uses this skill against Ugachi, severing the goblin's left arm with the skill.



Skills and Magic
Default Sword Skills
mostly common in SAO, New ALO, UW
Avalanche - Cyclone - Deadly Sins - Embracer - Explode Arrow[1] - Fell Crescent - Flashing Penetrator - Horizontal - Horizontal Arc - Horizontal Square - Howling Octave[2] - Lightning Fall - Linear - Meteor Break - Meteor Fall - Rage Spike - Reaver - Savage Fulcrum - Senda - Sharp Nail - Single Shot - Slant - Snake Bite - Sonic Leap - Spinning Shield - Star Splash[2] - Starburst Stream[3] - Treble Scythe - Tsumujiguruma - Tsujikaze - Ukifune - Vertical - Vertical Arc - Vertical Square - Vorpal Strike - Whirlwind
SAO Dual Blades - Extra Skills - Fishing - Hiding - Holy Sword - Searching - Tailoring - Tracking - Unique Skills
ALO Original Sword Skill(Mother's Rosario (OSS))
Magic Butterfly Shield - Cold resistance spell - Concealment - Earth Wall - Fireball - Fire Spear - Healing Magic - Hit Point Buff Magic - Hollow Body - Ice Arrows - Metamorphosis - Moonlight Mirror - Night Vision - Purified Surface - Retrieve Arrow - Sacrifice - Searcher - Smokescreen - Strength Buff Magic - Vacuum Blades - Water Breathing - Wind Needles
Project Alicization Sacred Arts - Incarnation - Synthesis Ritual
  1. Only in ALO.
  2. 2.0 2.1 Only in SAO and ALO
  3. Only in SAO