THE LEGION OF SUPERHEROES ADVENT CALENDAR - DAY THREE

But behind them all, there's another tape which reads "Love Kitties".

Adventure Comics vol.1 No.300 (September 1962)
“Great Scott! Look at these Hate Tapes…”

The Legion is bedeviled by URTHLO, a seemingly unstoppable super-being who hides his identity behind a solid-lead fright mask. Only defeating the villain by means of a genuine Hail Mary pass (they liberate doomed Legionnaire Mon-El from The Phantom Zone long enough to smash the baddie, but barely have time to return him to his exile before a fatal lead poisoning claims his life!), the Legion discovers that Urthlo is a robot duplicate of the adult Lex Luthor, sent through time to destroy his greatest enemy and his super-hero pals  and powered by “Hate Tapes” – discs which read “Hate Superboy”, “Hate Legion of Super-Heroes” and merely “Hate Hate Hate.” Well, you know what they say about Haters.

Wait a minute – URTHLO spells LUTHOR! WOW! He IS a genius!