骨髓#541

Marrow is an unlockable passive item added in The Binding of Isaac: Afterbirth † (Booster Pack #5).

• Marrow and Smelter are currently the only items you can unlock from defeating Mom's Heart or It Lives on Hard Mode. Bones Items
• Bone Spurs
• Brittle Bones
• Compound Fracture
• Host Hat
• Jaw Bone
• Marrow
• Pointy Rib
• Slipped Rib Trinkets
• Cursed Skull
• Finger Bone
• Hollow Heart
• Polished Bone
• Rib of Greed
• Wish Bone The Forgotten Unlocks Mom's Heart Unlocks It Lives Unlocks Booster Packs #1
• #2
• #3
• #4
• #5
• The Binding of Isaac: Rebirth
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