Idioms from fables

Carve a mark on the side of the moving ship to show where someone's sword fell ―― take measures regardless of the change of environment.

The Foolish Old Man Removes the Mountains

Pretend to love what you are actually afraid of.

Decorate yourself with borrowed feathers

Waiting for unexpected gains

Fish trapped in a dry rut-a desperate man

Frog living at the bottom of the well-depicting an ignorant man

Ask the tiger for its skin-trying the impossible things that run counter to the interests of the opponent (usually the bad guys)

to gild the lily