Crisis Core –Final Fantasy VII– Reunion Guide | How to Level Up Buster Sword
Here’s a guide on how to level up Buster Sword in Crisis Core –Final Fantasy VII– Reunion.
Game Guide by Ragib Rawnak on Jan 17, 2026
In Crisis Core: Reunion, Zack can use a special stance once he gets the big sword in Chapter 6. This is a bit like how Cloud fights in other games.
In this pose, Zack moves more slowly but hits much harder. He also takes less damage from enemies. It is important to know that you can only reach 95% skill with this sword. The game will not let you hit 100% before it ends.

Skills You Get as You Improve
When you first get the sword, your skill is at 0%. You still get three good moves right away. Strong Attack lets you hit very hard while in the stance.
Enhanced Guard blocks 80% of the damage from hits. Necromose gives you back a little magic and energy every time you win a fight in Crisis Core –Final Fantasy VII– Reunion.
As you use the sword more, you get better perks. At 23%, you get Damage Limit Break. This lets you do more than 9,999 damage with one hit. At 47%, you get Barrier Piercing. This lets your attacks go right through enemy magic shields.

How to Gain Skill Points
You have to show you are good with the sword to gain points. You can do this in three ways while in the stance. You can block a hit from an enemy.
You can kill an enemy with a heavy swing. You can also kill an enemy using a yellow magic move in Crisis Core –Final Fantasy VII– Reunion.
Raising this skill takes a long time. You only get a tiny bit of progress for each action. The game also stops you from gaining too many points in one fight. You can only get about half a percent each time you go into battle. You will have to fight many times to reach the 95% cap.
Also, check our other guides below:
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Effectively Use Battle Stance
- Crisis Core –Final Fantasy VII– Reunion Guide | How Boost Abilities with Battle Stance
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Upgrade Costly Punch
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Find Costly Punch
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Get Genji Helm
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Get Genji Shield
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Get All DMV Summons
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Find All Limit Breaks
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Get Genji Glove
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Complete All DMV Limit Breaks
- Crisis Core –Final Fantasy VII– Reunion Guide | How to Craft Costly Punch
- Crisis Core –Final Fantasy VII– Reunion Guide | Magic Pot DMW Summon Location
- Crisis Core –Final Fantasy VII– Reunion Guide | All Mascot Summons Locations
- Crisis Core –Final Fantasy VII– Reunion Guide | All Boss Summons Locations
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