Last Stand On New Krypton/War Of The Supermen

As part of his participation in Project 7734, Lex sends a robot double of himself with Brainiac on a mission to attack New Krypton. While there, the Lex robot tampers with the body chemistry of the previously-captured Reactron.[69] Shortly thereafter, Reactron kills himself, initiating a chain reaction which ultimately destroys New Krypton and all but a handful of its 100,000 Kryptonian inhabitants. Supergirl's mother Alura (who had assumed leadership of the planet) is among the casualties.[70] For his efforts, Lex receives a presidential pardon for his past crimes.[71]