This clever loop centers around Land's Edge as an active outlet that lets you discard Dakmor Salvage directly into the graveyard. Whenever Dakmor Salvage hits the graveyard, The Gitrog Monster's replacement draw trigger allows you to replace that draw with its dredge 2 ability, simultaneously milling cards and returning Dakmor Salvage right back to your hand. Because The Gitrog Monster's triggered ability fires off every time a land enters your graveyard from anywhere, the constant dredging fuels the loop to deal endless damage through Land's Edge.