What are the idioms of blood?

A bloody battle to the end,

Bleeding and dying,

Fight for the alliance,

Cold-blooded animals,

Take great pains,

Hit the nail on the head,

Eat hair and drink blood,

A firefight,

Rivers of blood,

Rhododendron cries blood,

On a whim,

Loyal,

Hot-blooded,

Have a boiling passion,

Tears in my heart,

Huang Xuan the Dragon Blood,

Fighting bloody battles,

A disaster of mass destruction,

Break someone's head,

Grandma,

Bleeding,

Dog blood spray,

Dog blood spray,

Feud,

Dirty lies,

Bloody shadows,

Flesh and blood,

Vomiting blood,

Bloody,

Kill without bloodshed-kill by subtle means