Galadriel of Lothlórien, Dryad Arbor, Retreat to Coralhelm, Mortuary, and Ashnod's Altar

Prerequisites

• Galadriel of Lothlórien on the battlefield
• Dryad Arbor in hand
• Retreat to Coralhelm on the battlefield
• Mortuary on the battlefield
• Ashnod's Altar on the battlefield
• You are abile to play a land this turn

Steps

1. Play Dryad Arbor
2. When Dryad Arbor enters the battlefield, Retreat to Coralhelm triggers
3. Holding priority, activate Ashnod's Altar by sacrificing Dryad Arbor, adding
4. When Dryad Arbor dies, Mortuary triggers, putting Dryad Arbor on top of your library from your graveyard
5. Resolve the Retreat to Coralhelm trigger from step 2, causing you to scry 1, ensuring to leave Dryad Arbor on top of your library
6. Galadriel's second ability triggers, causing you to reveal Dryad Arbor from the top of your library, and put it onto the battlefield tapped
7. Repeat from step 2

Results

• Infinite colorless mana
• Infinite death triggers
• Infinite ETB
• Infinite landfall triggers
• Infinite LTB
• Infinite sacrifice triggers