It took me about 1 hour to finish it, being the hardest part the last room which me took about 30 minutes.
The charms that I used were: Hiveblood, Unbreakable Heart and Grubsong. I was going to equip Unbreakable Strength too for the final part but I forgot.
Now the only thing that it is left is Patheon of Hallownest that I will probably never be able to finish it.

About Hollow Knight:

Hollow Knight is a 2017 action-adventure metroidvania video game. It was developed and published by Team Cherry, and released for Microsoft Windows, macOS, and Linux in 2017, and for the Nintendo Switch, PlayStation 4, and Xbox One in 2018.

You can buy it at:

Steam: https://store.steampowered.com/app/36...

PS Store: https://store.playstation.com/en-us/r...

XBOX LIVE: https://www.microsoft.com/en-us/p/hol...

Nintendo Switch: https://www.nintendo.com/games/detail...