(idiom) mountains of daggers and seas of flames; refers to a place or situation of extreme danger and difficulty

A cruel form of torture in ancient times involving a mountain of knives and a forest of swords; also used in Buddhist contexts for an agonizing punishment in hell.

(idiom) lit. mountains of daggers and seas of flames; fig. extremely dangerous and difficult places or situations

A hellish landscape of sword-trees and knife-mountains described in Buddhist scripture where leaves are blades and ground is spikes, later used to refer to cruel physical punishments

literally to climb mountains of swords and enter cauldrons of boiling oil; used to describe going through severe trials and tribulations or being willing to risk one's life

to climb mountains of swords and jump into seas of flames; to face extreme dangers or go through difficult trials for a cause