In Issue #24, Batman dispatched the Tulpa using a Batarang made of Nth Metal, one of the DC Universe's unique alien substances. In that series, Ecks was an Arkham physician who could project a powerful Tulpa from his consciousness. Falling deep into insanity, Double X would eventually escape Arkham Asylum and use his duplicate to battle both Batman and Superman in the pages of 1982's 'Double X Means Double Death,' published in World's Finest #276.Ī re-envisioned version of the good doctor was last sighted in the pages of DC's 2014 Batman: Eternal series. His doppelganger crossed paths with Batman and Robin, and the resulting strain on Double X's mind was too much to take. He amplified his aura, essentially creating a duplicate of himself to aid in a crime spree. Simon Ecks, Double X discovered a way to control the energy auras surrounding human bodies. Double X,' published in Detective Comics #261. RELATED: A DCEU Suicide Squad Character Goes Cannibal in Arkham City's First Issueĭouble X - or Doctor Double X, as he was formally called - made his debut in 1958's 'The Amazing Dr. Instead of serving up illicit substances, the owners of the house have decided to peddle Double X's unique powers, which can deliver 'a high like you've never felt before.' Despite Double X's whines and protests, an unwitting visitor takes the hand of the escaped Arkhamite and experiences an out-of-body rush that nearly explodes off the page. The six-issue series Arkham City: The Order of the Worldhas reintroduced a classic Batman villain from the Silver Age with a deadly new interpretation of his powers.ĭouble X makes an appearance in Issue #2 of the series, locked in the basement of a drug house.

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