 The Duke has also made use of advanced technology in his plans to attack Earth and destroy Wonder Woman.He attempted to shrink a Martian invasion fleet into a small box from which they would emerge in enlarged form, and he used the shrinking technology again to shrink down Skyscraper City.He has also employed a solar death ray, a forcefield that sealed in Washington, D.C. and also was a portal for an interplanetary invasion fleet, a "brain-wave deceiver" that could scramble a victim's perception of fantasy and reality, and a "gigantic inter-stellar cannon" that was able to target Wonder Woman's invisible jet.