He requires blood to live but only a small amount, which many of his "victims" (usually female) offer voluntarily.

He, like the Captain, does not require blood, and feeds of energy.

This reduces the work of the heart so that it requires less blood and oxygen.

And they're also smaller, faster, and require less blood than in the past.

The resurrection required Jake's own chi or blood to succeed.

Yet, the chance of a complication requiring blood, though small, was present.

The trouble is that even their love requires blood.

They require human blood; but only as part of their xenoforming project.

Like a Vampire, he can now change into a bat and requires human blood to survive.

I had hoped that 1 would not require blood last night.