How Can You Be a Thief in Runeterra?

When he traveled to Runeterra and became Silas, he thought he would be protected by Kyle, the Angel of Judgment, but he never expected to be targeted by Amon, the Angel of Time, and gain access to the Thief. Silas wanted to prove that he was not a thief, but he still stole Lux's heart, Fiona's favor, and he could sit next to Sona and do whatever he wanted... Faced with the century-old conspiracy of LeBlanc, the trickster, Silas directly called Amon by name to see which villain of the two worlds was more sinister and cunning, while he and his girls collected world runes to find a way home. ... After a long time, Runeterra gained peace. When people talked about Silas, they all recited his honorable name: "The liberator who does not belong to this era, the flower-planting believer of the peaceful world, the god who holds the authority of paradox."