Instructions
Distance yourself from Marrow when the fight starts. Dodge the bones that Marrow throws at you.
Press "Left" or "Right" on the D-Pad to switch to the Iceman character. Use Iceman's Freeze Blast move to slow down Marrow's movements.
Switch to Wolverine. Strike Marrow with physical attacks, like Eviscerate or Brutal Slash. If you attack quickly enough, these attacks remove one-third of her health bar.
Switch back to Iceman when Marrow unfreezes. Freeze her again and then switch to Wolverine.
Attack Marrow with Wolverine again to remove another one-third of her health. Repeat this process once more to defeat Marrow.