Glass Hearts

Glass Hearts are True Mode-exclusive consumables obtained by defeating their respective boss while having a Glass Soul equipped. Consuming a glass heart with all Life Crystals and Life Fruits consumed will grant you 50 more maximum health, with all 4 hearts giving you 200 more health.

Trivia

 * Each Glass Heart has the symbol and main color of the boss it belongs to on its design.
 * The mechanic of obtaining the hearts is a reference to Master Rounds from Enter the Gungeon, which are obtained by defeating a boss without getting hit.