Cracked Core

Cracked Core is the Defect's starting relic in Slay the Spire 2, automatically channeling 1 Lightning orb at the start of each combat. This free Lightning orb provides immediate passive damage output from turn 1, giving the Defect a head start on its Orb-based strategy without spending any Energy or cards on setup.

The channeled Lightning orb from Cracked Core deals passive damage each turn and can be evoked for a larger burst. With the Defect's starter card Dualcast, you can evoke this free Lightning orb for double damage on turn 1 for a strong opening play. As you acquire Focus from Defragment and Biased Cognition, even this single starting Lightning orb becomes more powerful. The free orb also occupies one of your initial Orb slots, so cards like Capacitor that increase Orb slots effectively multiply the value of this starting orb.

Cracked Core shapes the Defect's early game by providing baseline damage without card investment, freeing your first few turns for channeling additional Orbs or playing Power cards. Against Act 1 enemies in the Overgrowth, the passive Lightning damage chips away at enemies while you set up. Against bosses like Ceremonial Beast and Vantom, having guaranteed damage output from turn 1 helps the Defect keep pace with the boss's scaling. If offered a boss relic swap, consider that losing Cracked Core means losing free turn-1 tempo, which can be significant for the Defect's slower setup compared to the Ironclad's immediate Strength or the Silent's Poison application.