Caustic, whose real name is Alexander Nox, is the playable Legend of the first-person shooter video game Apex Legends. Caustic is the most prominent murderous scientist at Humbert Labs, who worked day and night to create new gases and is now testing and observing his creations. He possesses such abilities as Nox Gas Trap, Nox Gas Grenade, and Nox Vision. The Apex Legends cursor and game pointer with Caustic and Grenade!