Yucatec Scale-Clan

My Clansmen, our Pantheon, creatures of Xibalba, Aguateca. Blood has been spilled to build Yucatán, and we will honour it to the last drop. These ungodly terrors of both metal and darkness have no blood to give. They will pay in other ways. - Náajal, the Halach Uinic

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The Yucatec offer blood up to the gods to power their abilities, so you'll need to get your hands dirty in the Contest Phase, or spread the Yucatan poison, to ensure there's enough damage being done.