How can you create a combo with Yedora, Grave Gardener, Altar of Dementia, Watcher of the Roost?
user
[START OF COMBO]This combo can be formed with Yedora, Grave Gardener, Altar of Dementia, Watcher of the Roost

Color identity: GW
Mana cost: 
Steps:
  1. Activate Altar of Dementia by sacrificing Watcher of the Roost.
  2. When Watcher of the Roost dies, Yedora triggers, returning Watcher of the Roost from your graveyard to the battlefield face down as a Forest land.
  3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Watcher of the Roost's power.
  4. Activate Watcher of the Roost by tapping it, adding {G}.
  5. Activate Watcher of the Roost's morph ability by revealing a white card from your hand, turning it face up.
  6. Watcher of the Roost triggers, causing you to gain 2 life.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite green mana
  - Infinite landfall triggers
  - Infinite lifegain
  - Infinite lifegain triggers
  - Infinite leaves the battlefield
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You have at least one white card in hand.
[END OF COMBO PREREQUISITES]
assistant