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

Color identity: BRG
Mana cost: {4}{R}{R}
Steps:
  1. Activate Phyrexian Altar by sacrificing Eternal Witness, adding {R}.
  2. When Eternal Witness dies, Mortuary triggers, putting Eternal Witness on top of your library from your graveyard.
  3. 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.
  4. When Eternal Witness and the Treasures enter the battlefield, Amulet of Vigor triggers seven times and Eternal Witness triggers once.
  5. Resolve all Amulet of Vigor triggers, untapping the Treasures.
  6. Resolve the Eternal Witness trigger, returning Hit the Mother Lode from your graveyard to your hand.
  7. Activate six Treasures by tapping and sacrificing them, adding {4}{R}{R}.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite sacrifice triggers
  - Infinite storm count
  - Infinite Treasure tokens[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
  - Phyrexian Altar must be on the battlefield
[END OF COMBO PREREQUISITES]
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