The reason she is called the death messenger is because the word Valkyrie can be separated into two words, in which means it combined two different meanings.

在她被称为死亡使者的原因是因为女武神可分为两个词分开，这意味着它在这个词相结合两种不同的含义。

youdao

But to Mozart — at that time sick, depressed, haunted by the thought of death — the stranger seemed a messenger from the other world, bidding him write his own requiem.

但是，对莫扎特来说——此时他身体不好，情绪低落，整天想着死——这个陌生人无异是从另一个世界派来的使者，来命令他写下他自己的安魂曲。

youdao

Many a night, you and the death and disease resistance, when treatment is the doctor 's arm, patrol is the relatives of the patient, monitoring health Messenger, rescue is the life guard.

多少个夜晚，你们与死神和病魔抗争，治疗时是医生的臂膀，巡视时是患者的亲戚，监护时是是健康的使者，抢救时是生命的卫士。

youdao

Longing for death on the island of Naxos, she is redeemed by the love of the god Bacchus, who can also seem like the messenger of death.

WSJ: Review: A New-Look Ariadne Dazzles| 'Ariadne auf Naxos' |The Salzburg Festival