Bloodlust (noun)

An intense desire for violence or for the shedding of blood, especially in warfare.

Origin:

Early 20th century: from blood + lust.

Examples:

1. The soldiers' bloodlust made them kill indiscriminately.
2. The character's bloodlust was a major theme in the book.
3. The bloodlust of the warlord was legendary.
4. The bloodlust of the crowd was evident during the gladiator fight.
5. His bloodlust made him a dangerous opponent in the ring.