The Great Key was meant to unlock the ultimate weapon that would lead to a whole civilization's greatest strength- sadly, that was before Lavernius Tucker found it and swiped it away before the designated alien hero could get to it. Nowadays it acts as a sword and time-to-time VIP pass to some ultimate alien weaponry.
Powers and Stats
Tier: At least 9-A, likely higher
Name: The Great Key, The Great Weapon, Lightsaber (only by Caboose), Energy Sword
Origin: Red vs Blue
Classification: Alien Temple Key
Prerequisites: The holder must be the original founder of the key and have some spirit of the warrior- otherwise it will not work.
Attack Potency: At least Small Building level, likely higher (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)
Wielders: Lavernius Tucker, Doyle, Felix, Locus
Range: Extended melee range