A dredge is also a piece of heavy equipment used to remove overburden in an open pit or strip mine, or, in the case of goldplacer mining, to pick up ore and gravel and send it through sluices to remove gold and deposit the remaining rock, or tailings, behind the dredge.
Dredge is a keyword mechanic in Magic: The Gathering, which allows spells and creatures to be reused.
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