Dark Split-Sword

 Dual Swords =
 * -|Heavy Blade =

The Dark Split-Sword is a melee weapon with the unique ability to change forms depending on the Stance mod with which it is equipped: a double-ended greatsword when equipped with Heavy Blade stances, or wielded as two separate blades when using Dual Sword stances.

Characteristics
This weapon deals damage.

Advantages:
 * Innate damage – effective against Alloy Armor.
 * Stance slot has polarity, matches Swirling Tiger stance.
 * Highest status chance of any Heavy Blade.
 * Tied for the highest attack speed of any Dual Sword with Dual Kamas (Prime) and Dual Zoren.
 * Tied for third highest base and slide damage of any Dual Sword with Dex Dakra.
 * Highly versatile; able to crit build when given a Dual Sword stance, or status build by default.
 * When equipped with a Dual Sword stance, the following stats are increased:
 * Faster attack speed (up to 1.17).
 * Higher critical chance (up to 25.0%).
 * Higher critical damage (up to 2.5x).
 * Higher slide attack damage (up to 390.0).
 * Higher wall attack damage (up to 260.0).

Disadvantages:
 * stance polarity is incompatible with any of the Heavy Blade stances. Furthermore, Heavy Blade and Dual Sword stances do not share any polarities.
 * Lowest damage of any Heavy Blade.
 * When equipped with a Dual Sword stance, the following stats are reduced:
 * Lower base damage (down to 65.0).
 * Lower status chance (down to 15.0%).
 * Lower slam attack damage (down to 130.0).

Trivia

 * The Dark Split-Sword is the first melee weapon capable of using two different types of Stance mods, in this case Heavy Blade and Dual Sword stances, giving it the ability to use a total of 5 individual Stance mods.
 * The is the first weapon from the Tenno Lab to require Mutagen Masses in crafting.
 * On the Release of the PC Lunaro update, PC Gamer offered a limited time promo code for the Dulus weapon skin, which is essentially a stretched out PC Gamer logo on the sword.