  Non-stabilizerness - commonly known as magic - measures the extent to which a
quantum state deviates from stabilizer states and is a fundamental resource for
achieving universal quantum computation. In this work, we investigate the
behavior of non-stabilizerness around criticality in quantum spin chains. To
quantify non-stabilizerness, we employ a monotone called mana, based on the
negativity of the discrete Wigner function. This measure captures
non-stabilizerness for both pure and mixed states. We introduce R\'enyi
generalizations of mana, which are also measures of non-stabilizerness for pure
states, and utilize it to compute mana in large quantum systems. We consider
the three-state Potts model and its non-integrable extension and we provide
strong evidence that the mutual mana exhibits universal logarithmic scaling
with distance in conformal field theory, as is the case for entanglement.
