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'''Dune Threshers''' are large subterranean creatures , melee-attacking animals that look like a crocodile crossed with a shark. They can only attack on the surface, biting and clawing, but are able to "swim" under beneath the surface of desertssand, attacking victimsmoving very rapidly while submerged and surfacing beside or behind their targets.  Dune Threshers are [[animal]] type [[monster]]s.