Initial Card State
- Dryad Arbor in hand.
- All other permanents on the battlefield.
Notable Prerequisites
- You are abile to play a land this turn.
Steps
- Play Dryad Arbor.
- When Dryad Arbor enters the battlefield, Retreat to Coralhelm triggers.
- Holding priority, activate Altar of Dementia by sacrificing Dryad Arbor.
- When Dryad Arbor dies, Mortuary triggers, putting Dryad Arbor on top of your library from your graveyard.
- Resolve the Altar of Dementia ability, causing target player to mill cards equal to Dryad Arbor's power.
- Resolve the Retreat to Coralhelm trigger from step 2, causing you to scry 1, ensuring to leave Dryad Arbor on top of your library.
- Galadriel's second ability triggers, causing you to reveal Dryad Arbor from the top of your library, and put it onto the battlefield tapped.
- Repeat from step 2.
Results
- Infinite death triggers.
- Infinite ETB.
- Infinite landfall triggers.
- Infinite LTB.
- Infinite mill.
- Infinite sacrifice triggers.
- Infinite self-mill.
Bracket Tag
This combo has been estimated to be Exhibition (Bracket 1+).