Resilience

Resilience is an ability possessed by all practitioners with the Magic power source.

The "Wizard's Constitution" as it is sometimes known is not at all specific to wizards. All practitioners enjoy this benefit; typically, its intensity correlates with degree of magical talent.

The leading theory (at least of wizards) is that, as Magic is powered by a global, permeating energy field created and sustained by living things (again, per their theory), the presence of concentrated magical energy in a practitioner's body naturally empowers their existing regenerative systems to function at extraordinary capacity. Few practitioners disagree with this basic premise, but other traditions vary on the moral implications of Resilience, or on which exact factors correlate most strongly with regeneration. In particular, witches note that practitioners of the Dark Arts (across all disciplines) seem to be less likely to avoid the withering effects of age (indeed, some who go particularly overboard age and wither prematurely), yet their lifespans are not affected, hinting at a more supernatural, less biological explanation.

The practical effects: