How can you create a combo with Archghoul of Thraben, Mortuary, Shambling Ghast, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Archghoul of Thraben, Mortuary, Shambling Ghast, Phyrexian Altar

Color identity: B
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrificing Shambling Gast, adding {B}.
  2. Mortuary, Shambling Ghast and Archghoul of Thraben trigger.
  3. Resolve the Mortuary trigger, putting Shambling Ghast on top of your library.
  4. Resolve the Shambling Ghast trigger, choosing either to give an opponent's creature -1/-1 until end of turn or creating a Treasure token.
  5. Resolve the Archghoul of Thraben trigger, revealing Shambling Ghast from the top of your library and putting it into your hand.
  6. Cast Shambling Ghast by paying {B}.
  7. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count
  - Infinite Treasure tokens
  - Reduce each opposing creature's toughness to zero[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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