"ascending the ladder made of blades"?

climbing up and down a ladder composed of knives；

Climbing a ladder of knives is the traditional performance and customs of the Miaos；

She climbs a ladder of deadly sword blades barefoot.

A test for Taoist masters that requires the climbing of a 108-step sword ladder was held at the Beitian Temple in Hualian's Ji-an Township.

The people who climb the knife ladder should have great courage and insight, technique and gest,

and they climb from the first knife blade to the last one on the top while the knife becomes more and more sharp.

thanks all