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So it is a sword. It just happens to function like a key in very specific situations. Or it's a key all the time, and when you stick it in people, it unlocks their death.
— Church and Caboose discussing the Great Key
Do I know how to use it? Of course I know how to use it. What's so hard to understand about "swish, swish, stab"?


The Great Key is a powerful sword/key found by Lavernius Tucker during the Blood Gulch Chronicles. It functions as a key to various alien buildings, structures, and vaults throughout the universe, and apparently as a holy icon to the alien civilization as a whole. Characters such as Caboose have described it as "...a key, except it also unlocks people's deaths."

Powers and Stats

Tier: At least 9-A, likely higher

Name: Great Key, Great Weapon, Lightsaber (Only by Caboose), Keyblade, Energy Sword

Origin: Red vs Blue

Age: Unknown

Classification: Alien Temple Key

Wielders: Tucker, Doyle, Felix, Locus

Powers and Abilities: Energy Manipulation (Uses energy as a heat-based entity to cut through nearly any surface)

Attack Potency: At least Room level (Cut through a huge steel box the size of two-three trailers and filled with equipment with relative ease, Impaled The Meta through the chest, albeit with little effect)

Range: Extended melee, activation is up to several meters

Weaknesses: It can only be used by its original owner