Iron Tarkus, full name Black Iron Tarkus, is a summonable knight in FromSoftware's Dark Souls, released in 2011. Found before the Iron Golem fight at the top of Sen's Fortress, he became famous because his high damage and poise let him defeat the boss almost alone. Players turned that reputation into a running joke, crediting him as an unbeatable champion and thanking him whenever he saved a difficult run, which helped the phrase spread through gameplay clips and Souls community memes.