To increase the number of Masks the player has, they'll need to collect Mask Shards. The more Masks the Knight has, the more hits he'll be able to take before he is sent back to the bench.
RELATED: Hollow Knight: Best Spells & Abilities In The Game In this game, the health system comes in the form of Masks. To conquer the game's difficulty and make it much easier, one of the best things the player can do is increase their HP. The combat system of Hollow Knight can be terribly unforgiving.