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Ironhammer's Crypt is a small cave filled with cave spider eggs and a couple of Juvenile Cave Spiders. You can crush some eggs and kill the spiders that emerge for the heart task in that area. There's a wall blocking of the rest of the crypt which is tempting to try and climb across, with no apparent success. The entrance is guarded by a few dredge.
This place is also the tombs of the Ironhammer family.