  We study scenarios where a scalar field has a spatially varying vacuum
expectation value such that the total field variation is super-Planckian. We
focus on the case where the scalar field controls the coupling of a U(1) gauge
field, which allows us to apply the Weak Gravity Conjecture to such
configurations. We show that this leads to evidence for a conjectured property
of quantum gravity that as a scalar field variation in field space asymptotes
to infinity there must exist an infinite tower of states whose mass decreases
as an exponential function of the scalar field variation. We determine the rate
at which the mass of the states reaches this exponential behaviour showing that
it occurs quickly after the field variation passes the Planck scale.
