Health Points — Ichoron
Stage 1: 17,940,000,000
Stage 2: 128,570,000,000
Stage 3: 299,000,000,000
Stage 4: 657,800,000,000
Stage 5: 1,058,460,000,000
Stage 6: 1,725,230,000,000
Stage 7: 2,155,790,000,000
Note that the displayed Health Points may vary during your playthrough, as certain Demonsbane effects can augment the Health Points of bosses.