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sand screamer

The sand screamer was a mysterious Rahi found on the island of Voya Nui. The agonized shrieks of the sand screamer were often heard, but the creature itself was never seen. Tracks sighted by Matoran vanished in seconds. Evidence indicated that whatever the sand screamer was, it was capable of bringing down larger beasts.[1]

Notes

The sand screamer was one of the most mysterious creatures on Voya Nui. Although it was classified as a Rahi, no one ever saw it. It could be heard in the middle of the night, screaming over the island's barren terrain as if in agony. Tracks sighted by Matoran disappeared within a matter of seconds. Signs were most often found around the dead bodies of larger beasts, suggesting that the sand screamer was dangerous.[2]