FYI, I am not Catholic (as in Roman Catholic), or any other kind. I was cradle Eastern Orthodox until I stopped. As a practicing Orthodox Christian I never believed in transubstantiation. The Orthodox believe in the Real Presence but do not offer a "mechanism" by which this mysterion occurs.
Now I am an agnostic, and I see much of the biblical miracles as nothing short of magic.
Do you recognize magic as being real? That it actually happens?