Devil Heart
Drops from Awakened Devil at Frostspire Bastion Nightmare. Compound probability is 15% spawn x 35% kill = 5.25% per run.
Exotic Shattered Armor
Drops from Igris Secret Boss at 8% per encounter. Source mode: Underworld Gate Nightmare or Endless.
Exotic Essence
5% per UGN completion OR 30% per Challenge Mode boss clear.
Exotic Ore
35% per Igris kill at Challenge Mode wave 30+, OR 15% per UGN drop.
Heavenly Fragments
5% per eligible Challenge Mode boss; approximately 3 eligible bosses per run.
Sukuna / Gojo / Asta Fragments
0.40 per Boss Rush floor 40+ clear. 50 fragments per class unlock.