  We discuss how to generate a black hole solution of the Einstein Equations
(EE) via non-linear electrodynamics (NED). We discuss the thermodynamical
properties of a general NED solution, recovering the First Law. Then we
illustrate the general mechanism and discuss some specific cases, showing that
finding a generating Lagrangian (for a specific solution) only requires solving
an algebraic equation (we study some analytical cases). Finally, we argue that
NED paradigm, though self-consistent, is not the best tool for studying regular
black holes.
