This chapter explores how Global South states strategically construct narratives in international legal and political arenas to advance distinct climate agendas. It examines the interplay between political discourse at COPs 26, 27 and 28 and legal arguments presented before the ITLOS advisory proceedings on climate change. The chapter identifies two predominant narratives. The first, adopted by emerging economies such as Brazil, India, China, and Egypt, emphasizes developmental priorities and the principles of CBDR-RC, cooperation, and assistance, resisting legal interpretations that could impose greater obligations. The second, advanced by the most vulnerable states—including small island nations and least developed countries—foregrounds human rights, state responsibility, and survival imperatives, calling for urgent action and reparation. These narratives reveal a divide within the Global South and demonstrate how international law is mobilized not only as a normative framework but also as a strategic tool to shape and contest global climate governance. The chapter underscores that legal proceedings before ICTs serve both as platforms for normative clarification and as catalysts for broader political transformation.