A guide on adjusting charm notch costs.
How to Modify Charm Costs
1. Download dnSpy[github.com] for 64-bit
2. Launch dnSpy and go to File > Open
3. Open Hollow Knight’s Assembly-CSharp.dll file which is usually located in C:\Program Files (x86)\Steam\steamapps\common\Hollow Knight\hollow_knight_Data\Managed\
4. Expand Assembly-CSharp
5. Expand { } –
6. Expand PlayerData
7. Select SetupNewPlayerData
8. Scroll down to around line 471, select it, and then press Ctrl + Shift + E to open the edit window.
9. There are 40 charms named “this.CharmCost_1” through “this.CharmCost_40″. Edit the number after to change the cost. For example, ” this.CharmCost_1 = 0″ would make Gathering Swarm cost 0 notches. Refer below for charm IDs.
10. Hit Compile when you are done.
11. Close dnSpy. It will ask you if you want to save, click Yes, then click OK.
12. You are done. Create a new saved game for these changes to take affect.
2. Launch dnSpy and go to File > Open
3. Open Hollow Knight’s Assembly-CSharp.dll file which is usually located in C:\Program Files (x86)\Steam\steamapps\common\Hollow Knight\hollow_knight_Data\Managed\
4. Expand Assembly-CSharp
5. Expand { } –
6. Expand PlayerData
7. Select SetupNewPlayerData
8. Scroll down to around line 471, select it, and then press Ctrl + Shift + E to open the edit window.
9. There are 40 charms named “this.CharmCost_1” through “this.CharmCost_40″. Edit the number after to change the cost. For example, ” this.CharmCost_1 = 0″ would make Gathering Swarm cost 0 notches. Refer below for charm IDs.
10. Hit Compile when you are done.
11. Close dnSpy. It will ask you if you want to save, click Yes, then click OK.
12. You are done. Create a new saved game for these changes to take affect.
Wayward Compass: charm_2 Gathering Swarm: charm_1 Stalwart Shell: charm_4 Soul Catcher: charm_20 Shaman Stone: charm_19 Soul Eater: charm_21 Dashmaster: charm_31 Sprintmaster: charm_37 Grubsong: charm_3 Grubberfly's Elegy: charm_35 Fragile/Unbreakable Heart: charm_23 Fragile/Unbreakable Greed: charm_24 Fragile/Unbreakable Strength: charm_25 Spell Twister: charm_33 Steady Body: charm_14 Heavy Blow: charm_15 Quick Slash: charm_32 Longnail: charm_18 Mark of Pride: charm_13 Fury of the Fallen: charm_6 Thorns of Agony: charm_12 Baldur Shell: charm_5 Flukenest: charm_11 Defender's Crest: charm_10 Glowing Womb: charm_22 Quick Focus: charm_7 Deep Focus: charm_34 Lifeblood Heart: charm_8 Lifeblood Core: charm_9 Joni's Blessing: charm_27 Hiveblood: charm_29 Spore Shroom: charm_17 Sharp Shadow: charm_16 Shape of Unn: charm_28 Nailmaster's Glory: charm_26 Weaversong: charm_39 Dream Wielder: charm_30 Dreamshield: charm_38
Thanks to Ben for his great guide, all credit to his effort. you can also read the original guide from Steam Community. enjoy the game.