Mana is what allows witches and others to use magic.

The witch uses blood from father and son to resurrect the creature's corpse.

She was eager to see cloud-pine, because the witches used it for flying, and she'd never seen any before.

This is how the old witches used to work.

They usually worked within small chambers, with wall paintings, which confined the power raised, just as witches use a circle for the same purpose.

Now all this might apply to the consecrated cord which witches possess and use in many ways.

That thick blade must be good steel, since no true witch could use iron; it was fairly sharp, not very long.

That's a liquid; witches use it in France on arrows.

She and a male witch used to lead a small coven in that room.

Somehow the witch was using the little girl to get at the High Lord.