Context: In Hollow Knight, there's an area called Godhome in which you can play against multiple bosses one after the other, i.e. it's a boss rush mode. You have the option to enable restraints to weaken yourself for added challenge.
rentatsu-sha no shinden 練達者の神殿 Temple of the Expert. (literally.) Pantheon of the Master. (original English version.)
kugi to kara no kami wo motome yo 釘と殻の神を求めよ Seek the gods of nail and shell.
kousoku 拘束 Restraints. (chains, in this case, as the enabled restraints are struck through with binding chains.)
