Bone Marrow

Who you meet here

BossHematopoietic Stem CellThe mother of every blood cell. It keeps making new ones (neutrophils, myeloblasts, platelets, even megakaryocytes and…Key guardianGiant OsteoclastA huge bone-dissolving cell (Ancient) guarding the Mucolytic Enzyme. It burrows after you and erupts where it surfaces.GeneMucolytic EnzymeDissolves mucus plugs. Mucus no longer slows you.CancerMultiple MyelomaA malignant plasma cell drifting in slow circles, firing spirals of Y-shaped antibodies that lock on to you and…AssassinLytic StalkerA jagged bone shard. Where its pounce lands it punches a small bone lesion that hurts to stand in.

Organ facts

Objective

"Take over the Hematopoietic Stem Cell"

Boss

Hematopoietic Stem Cell, "Mother of every blood cell"

Key guardian

Giant Osteoclast (Ancient), holding the Mucolytic Enzyme

Cancer

Multiple Myeloma (dodge its antibody spirals when they lock on, and keep off the bone lesions). Its assassin is the Lytic Stalker

Hazards

stem cell niches you can burst for health

Local cells

Myeloblasts, Megakaryocytes, Platelets, Neutrophils, Monocytes, Plasmablasts, Eosinophils and Lymphoid Progenitors. Deeper rooms add NKT Cells, Helper T Cells and vaccine vials

Look

a bone-brown floor crossed by cream bone struts and pale fat cells, inside hard, pale bone walls honeycombed with marrow pores

Music

E-flat harmonic minor at 120 BPM, the fastest theme

Size

21–25 rooms

Threat

enemy damage ×9.5, enemy health ×28, rewards ×4.7

Also in the Bone Marrow

Tissue Hazards & TerrainOrgans & Bosses

Stem Cell NichesA pod of young blood cells. Burst it to heal, but fresh neutrophils pour out.Bone MarrowClots & Scar TissueSticky patches of clot left by dying platelets, fibrin attacks, goblet mucus and stellate scarring. They bog you right down.Bloodstream & deeper

Tumor PartsCancer

Myeloma coreA malignant plasma cell with an off-centre nucleus, stuffed with stored antibody and studded with Y-shaped M-proteins.Bone MarrowMyeloma cloneA small oval plasma cell that keeps its distance, circling you and firing single antibodies.Bone Marrow

Tumor AttacksCancer

M-protein spiralA spiral of Y-shaped antibodies that flare, then all turn at once toward where you are standing.Bone MarrowBone lesionsMarked circles at and around you collapse into punched-out holes in the bone.Bone MarrowAntibody shotMyeloma clones fire single Y-shaped antibodies at you while circling at range.Bone Marrow

Organ MilestonesViruses

Halovirus: Bone MarrowInfection, spike volleys, outbreaks and the ultimate hit 60% harder.Organ 7

The Organ MapIn a Run

Bone MarrowTake over the Hematopoietic Stem Cell.Organ 7

Boss SetsGear & Store

Integrase CoreThe Hematopoietic Stem Cell's set, built for sustain.Organ 7 · Bone Marrow

Audio & PresentationGame Modes

Bone Marrow themeThe fastest organ theme.Organ 7

Found in every organ

Abyss PitsBottomless gaps in the tissue. Falling in is a heavy blow, not instant death.Any organDrop ShaftsA rare glowing shaft in one of an organ's deeper fight rooms. Walk in and the current sweeps you into a freshly shuffled layout of the…Rare

From the Codex