How can you create a combo with Relentless Dead, Rooftop Storm, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Relentless Dead, Rooftop Storm, Phyrexian Altar

Color identity: UB
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrificing Relentless Dead, adding {B}.
  2. Relentless Dead's first and second abilities trigger.
  3. Resolve Relentless Dead's first ability, causing you to pay {B} to return Relentless Dead from your graveyard to your hand.
  4. Resolve Relentless Dead's second abilitiy, choosing not to pay.
  5. Cast Relentless Dead by paying {0}.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - 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]
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