Alex Armstrong killed Sloth by impaling him with an earth spike in the anime series "Fullmetal Alchemist." Normally, Sloth regenerates after an injury, but as he was pinned down by the spike, he lost so much energy that he was unable to regenerate. As a result, he disintegrated. When he realized he was dying, Sloth met the occasion with a smile because living had become too much effort for him.
In the scene preceding his death, Sloth had been sent to take care of General Olivier Armstrong, the sister of Alex Armstrong. Sloth battled both siblings until he was attacked and killed by Alex and Sig Curtis.
Named after one of the seven deadly sins, Sloth is a Homunculus from the 2009 version of the anime series "Fullmetal Alchemist." He is not the same as the character with the same name from the 2003 version.
Latin for "little human," a homunculus is a creature that has been created by alchemy in secret, and these creatures are the antagonists in the "Fullmetal Alchemist" series. Sloth and his six siblings are all equipped with a Sorcerer's Stone, and as long as the stone is intact, they can regenerate. Sloth was only the fourth homunculus to die.