When Dakmor Salvage enters, Greensleeves and Kodama trigger.
Resolve the Kodama trigger, choosing to put nothing onto the battlefield.
Holding priority, activate Trenching Steed by sacrificing Dakmor Salvage.
The Gitrog Monster's second ability triggers, causing you to mill two cards and return Dakmor Salvage from your graveyard to your hand.
If a land was milled this way, The Gitrog Monster's second ability triggers, causing you to draw a card.
Resolve the Trenching Steed ability
Resolve the Greensleeves trigger, creating a token.
When the token enters the battlefield, Kodama triggers, putting Dakmor Salvage from your hand onto the battlefield.
When Dakmor Salvage enters the battlefield, Greensleeves triggers.
Repeat from step 4.
This self-sustaining loop transforms the humble act of playing a land into an endless cascade of triggers, fueled by Kodama of the East Tree's ability to cheat permanents into play whenever another permanent enters your control. By using Trenching Steed to sacrifice Dakmor Salvage right back to the graveyard, you trigger The Gitrog Monster's draw replacement effect—which allows you to swap your standard draw for Dakmor Salvage's dredge ability, milling cards and returning the land safely to your hand. Meanwhile, Greensleeves, Maro-Sorcerer chimes in with every single re-entry by generating 3/3 Badger creature tokens off its landfall ability, which in turn feed right back into Kodama of the East Tree to restart the entire sequence.