Activate Sylvan Safekeeper by sacrificing any land except Shifting Woodland
Repeat step 1 until you control no other lands except Shifting Woodland.
Activate Shifting Woodland's second ability by paying {2}{G}{G}, causing it to become a copy of Aftermath Analyst until end of turn.
Activate Shifting Woodland by paying {3}{G} and sacrificing it, returning it and all other land cards from your graveyard to the battlefield tapped.
When the lands enter the battlefield, Lotus Cobra triggers that many times, adding {G} for each land that entered the battlefield this way.
Repeat.
Resolve all Sylvan Safekeeper abilities.

Infinite LTB

Infinite colored mana

Infinite sacrifice triggers

Infinite death triggers

Infinite landfall triggers

Shifting Woodland

Aftermath Analyst

Lotus Cobra

Sylvan Safekeeper

Activate Sylvan Safekeeper by sacrificing any land except Shifting Woodland
Repeat step 1 until you control no other lands except Shifting Woodland.
Activate Shifting Woodland's second ability by paying {2}{G}{G}, causing it to become a copy of Aftermath Analyst until end of turn.
Activate Shifting Woodland by paying {3}{G} and sacrificing it, returning it and all other land cards from your graveyard to the battlefield tapped.
When the lands enter the battlefield, Tireless Provisioner triggers that many times, creating a Treasure token for each land that entered the battlefield this way.
Activate eight Treasures by tapping and sacrificing them, adding {5}{G}{G}{G}.
Repeat.
Resolve all Sylvan Safekeeper abilities.

Infinite lifegain triggers

Infinite lifegain

Infinite Treasure tokens

Infinite Food tokens

Tireless Provisioner

Activate Sylvan Safekeeper by sacrificing any land except Shifting Woodland.
Repeat step 1 until you control no other lands except Shifting Woodland.
Activate Shifting Woodland's second ability by paying {2}{G}{G}, causing it to become a copy of Aftermath Analyst until end of turn.
Activate Shifting Woodland by paying {3}{G} and sacrificing it, returning it and all other land cards from your graveyard to the battlefield untapped due to Spelunking.
Activate any number of lands by tapping them, adding at least {5}{G}{G}{G}.
Repeat.
Resolve all Sylvan Safekeeper abilities.

Infinite mana lands you control can produce

Spelunking

Activate Sylvan Safekeeper by sacrificing any land except Shifting Woodland.
Repeat step 1 until you control no other lands except Shifting Woodland.
Activate Shifting Woodland's second ability by paying {2}{G}{G}, causing it to become a copy of Aftermath Analyst until end of turn.
Activate Shifting Woodland by paying {3}{G} and sacrificing it, returning it and all other land cards from your graveyard to the battlefield tapped.
When the lands enter the battlefield, Nissa triggers that many times, adding {G} for each land that entered the battlefield this way.
Repeat.
Resolve all Sylvan Safekeeper abilities.

Nissa, Resurgent Animist

Activate Squandered Resources by sacrificing any land except Shifting Woodland, adding {G} if possible, or one mana of any other type otherwise.
Repeat step 1 until you control no other mana-producing lands except Shifting Woodland.
Activate Shifting Woodland's second ability by paying {2}{G}{G}, causing it to become a copy of Aftermath Analyst until end of turn.
Activate Shifting Woodland by paying {3}{G} and sacrificing it, returning it and all other land cards from your graveyard to the battlefield tapped.
Repeat.
If you control nine or more other mana-producing lands, this combo will net infinite mana of colors those lands can produce.

Squandered Resources

Play Lotus Field. When it enters untapped due to Spelunking, it triggers.
Holding priority, activate Lotus Field by tapping it, adding {G}{G}{G}.
Resolve the Lotus Field trigger, sacrificing it and Echoing Deeps.
Activate Aftermath Analyst by paying {3}{G} and sacrificing it, returning all land cards from your graveyard to the battlefield untapped due to Spelunking. Choose to have Echoing Deeps enter as a copy of Lotus Field.
When Echoing Deeps and Lotus Field enter, they each trigger.
Holding priority, activate Echoing Deeps, Lotus Field and two other mana-producing lands except Shifting Woodland by tapping them, adding at least {5}{G}{G}{G}.
Resolve the Echoing Deeps and Lotus Field triggers, sacrificing them and the lands tapped for mana in step 6.
Activate Shifting Woodland's first ability by tapping it, adding {G}.
Activate Shifting Woodland's second ability by paying {2}{G}{G}, causing it to become a copy of Aftermath Analyst.
Activate Shifting Woodland by paying {3}{G} and sacrificing it, returning all land cards from your graveyard to the battlefield untapped due to Spelunking. Choose to have Echoing Deeps enter as a copy of Lotus Field.
Repeat from step 5.

Combos with "Shifting Woodland"