How can you create a combo with Galadriel of Lothlórien, Dryad Arbor, Retreat to Coralhelm, Mortuary, Phyrexian Altar?
user
[START OF COMBO]This combo can be formed with Galadriel of Lothlórien, Dryad Arbor, Retreat to Coralhelm, Mortuary, Phyrexian Altar

Color identity: BGU
Mana cost: 
Steps:
  1. Play Dryad Arbor.
  2. When Dryad Arbor enters the battlefield, Retreat to Coralhelm triggers.
  3. Holding priority, activate Phyrexian Altar by sacrificing Dryad Arbor, adding one mana of any color.
  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.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite landfall triggers
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Galadriel of Lothlórien must be on the battlefield
  - Dryad Arbor must be in your hand
  - Retreat to Coralhelm must be on the battlefield
  - Mortuary must be on the battlefield
  - Phyrexian Altar must be on the battlefield
  - You are abile to play a land this turn.
[END OF COMBO PREREQUISITES]
assistant