Obsidian Greatsword

The Obsidian Greatsword is a Greatsword in Dark Souls.

Availability
Obtained by cutting off the tail of Black Dragon Kalameet.

Characteristics
When two-handed, the Obsidian Greatsword only requires 14 strength to wield. The two-handed strong attack unleashes an AoE attack reminiscent to Kalameet's fire breath, and causes high stamina drain for anyone who blocks the hit. This attack uses 50 durability.

While the Obsidian Greatsword has no scaling, it has great base damage, and good weight for a greatsword. Its low requirements make it a great greatsword for players that want to invest in neither strength nor dexterity. In particular, the lack of scaling means that even one-handed, the Obsidian Greatsword packs a punch. The next strongest greatsword, the Man-Serpent Greatsword, would require 23 strength to match the Obsidian Greatsword's damage output 2-handed, and 34 1-handed.

Unusually for a non-standard weapon, the Obsidian Greatsword can be enchanted.

Trivia

 * The Obsidian Greatsword is labeled as a Greataxe in its item description. This is probably a translation error.
 * The Obsidian Greatsword is considered by most fans to be the hardest Dragon weapon to obtain.

Upgrades
The Obsidian Greatsword requires Dragon Scales to upgrade, and requires 10,000 souls per upgrade.