This paper will discuss the land struggles of the Indigenous Laklãnõ-Xokleng community in Santa Catarina, southern Brazil. Drawing on short-term ethnographic fieldwork and interviews conducted in February and March 2024 – as well as a review of existing legal and academic literature – it will argue that their case is significant for understanding the links between climate justice and land claims in the Global South. It will argue for the concept of sacred demarcations as the unstable lines of resistance to sacrifice zones in the time of the climate crisis. These demarcations reveal the mutable material, juridical, social and spiritual contours of land disputes. The paper will discuss the community’s victory in Brazil’s Supreme Court in September 2023 against the ‘marco temporal thesis,’ which sought to limit Indigenous land claims to territory occupied in 1988. The case originated in a land dispute around a nature reserve established in Laklãnõ-Xokleng territory. However, in October 2023, the gates of a containment dam were closed, leading to the flooding of Laklãnõ-Xokleng territory and the displacement of community members to protect primarily white communities downriver. Military police brutally repressed protests. Furthermore, Indigenous attempts to reclaim land have precipitated a violent backlash by white settlers, including the murder of a youth and the destruction of houses. The paper will also examine a youth-based reforestation project for the sacred araucaria tree and its connection to these land struggles and global climate politics. The paper will argue that Laklãnõ-Xokleng struggles represent a microcosm of global politics around climate justice – involving decolonial and restorative land claims, resistance to environmental racism and the creation of flooding areas, and the tensions of local reforestation in relation to the global politics of climate finance and carbon markets. It will also explore the possibilities of transatlantic collaborations in the struggle against the climate crisis.