Steam Crackler Heart

 is a stone.

Obtaining

 * Dropped by
 * Steam Crackler

Uses

 * Used in the craft of
 * Arctangent Bow
 * Bim Bonnet
 * Boy's Own Chain
 * Cape Tivate
 * Key to the Obsidemon's Hypogeum
 * Notewell Ring
 * Obsidemon Amulet
 * Obsidemon Boots
 * Obsidemon Helmet
 * Obsidemon Ring
 * Sandals Bino
 * The Maidartes