assume the mantle

From the act of putting on particular robes of office.

assume the mantle (third-person singular simple present assumes the mantle, present participle assuming the mantle, simple past and past participle assumed the mantle)

1. (idiomatic, with "of") To take on a specific role or position, along with any associated responsibilities.

• take up the mantle
• pick up the mantle

• carry the mantle