How can you create a combo with Archghoul of Thraben, Mortuary, Rooftop Storm, Ashnod's Altar?
user
[START OF COMBO]This combo can be formed with Archghoul of Thraben, Mortuary, Rooftop Storm, Ashnod's Altar

Color identity: UB
Mana cost: 
Steps:
  1. Activate Ashnod's Altar by sacrificing Archghoul of Thraben, adding {C}{C}.
  2. Mortuary and Archghoul of Thraben trigger.
  3. Resolve the Mortuary trigger, putting Archghoul of Thraben on top of your library from your graveyard.
  4. Resolve the Archghoul of Thraben trigger, revealing Archghoul of Thraben from the top of your library and putting it into your hand.
  5. Cast Archghoul of Thraben by paying {0}.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

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