Which kind of mortar and pestle replaces a blender?
An MP will never replace a blender for pureeing liquids. First, you can't put much liquid in even the largest countertop MP, no more than a liter. Second, MPs do not work for pureeing liquids, but rather for grinding dry ingredients. If you were to put a chunky soup in, and try to pound it, the soup would just splash all over the counter.