Extremal black holes play a key role in our understanding of various swampland conjectures and the WGC in particular. The mild form of the WGC states that higher-derivative corrections should decrease the mass of extremal black holes at fixed charge. Whether or not this conjecture is satisfied depends on the sign of the combination of Wilson coefficients that control corrections to extremality. Typically, these corrections need to be computed on a case-by-case basis, but in this talk I will present a universal derivation that can be applied to a wide class of black holes. As a particular application of interest, I will use this formalism to compute corrections to rotating extremal black holes and assess the possibility of a rotating WGC.