How can you create a combo with Hit the Mother Lode, Mortuary, Eternal Witness, Amulet of Vigor, Altar of Dementia?
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[START OF COMBO]This combo can be formed with Hit the Mother Lode, Mortuary, Eternal Witness, Amulet of Vigor, Altar of Dementia

Color identity: BRG
Mana cost: {4}{R}{R}{R}
Steps:
  1. Activate Altar of Dementia by sacrificing Eternal Witness.
  2. When Eternal Witness dies, Mortuary triggers, putting Eternal Witness on top of your library from your graveyard.
  3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Eternal Witness's power.
  4. Cast Hit the Mother Lode by paying {4}{R}{R}{R}, exiling Eternal Witness from the top of your library and casting it without paying its mana cost, and creating seven tapped Treasure artifact tokens.
  5. When Eternal Witness and the Treasures enter the battlefield, Amulet of Vigor triggers seven times and Eternal Witness triggers once.
  6. Resolve all Amulet of Vigor triggers, untapping the Treasures.
  7. Resolve the Eternal Witness trigger, returning Hit the Mother Lode from your graveyard to your hand.
  8. Activate seven Treasures by tapping and sacrificing them, adding {4}{R}{R}{R}.
  9. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite mill
  - Infinite sacrifice triggers
  - Infinite self-mill
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Hit the Mother Lode must be in your hand
  - Mortuary must be on the battlefield
  - Eternal Witness must be on the battlefield
  - Amulet of Vigor must be on the battlefield
  - Altar of Dementia must be on the battlefield
[END OF COMBO PREREQUISITES]
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