Ultimate Fantastic Four #41

Overview

With arcane energies pouring through the timegate into present day New York, the F.F. must defeat its merciless creator, the alchemist Diablo—or risk the city’s destruction! But how can Reed Richards destroy a machine when his own sister is the living engine powering it? The answer will shock you! Part 3 (of 3)

Oh and the Thing is left feeling a little blue.