How can you create a combo with Hostility, Reiterate, Thud, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Hostility, Reiterate, Thud, Phyrexian Altar

Color identity: R
Mana cost: {4}{R}{R}{R}
Steps:
  1. Cast Thud by paying {R} and sacrificing a creature you control with power seven or greater.
  2. Holding priority, cast Reiterate with buyback by paying {4}{R}{R}, creating a copy of Thud and returning Reiterate to your hand.
  3. Resolve the Thud copy, causing you to create at least seven 3/1 Elemental Shaman creature tokens with haste due to Hostility.
  4. Activate Phyrexian Altar seven times by sacrificing seven Elemental Shamans, adding {5}{R}{R}.
  5. Repeat from step 2 an arbitrarily large number of times.
  6. Activate Phyrexian Altar by sacrificing Hostility, adding {R}.
  7. Hostility dies, shuffling itself into your library from your graveyard.
  8. Cast Reiterate with buyback by paying {4}{R}{R}, creating a copy of Thud and returning Reiterate to your hand.
  9. Resolve the Thud copy, dealing at least seven damage to any target.
  10. Repeat from step 8.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite creature tokens with haste
  - Infinite damage
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite magecraft triggers
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Hostility must be on the battlefield
  - Reiterate must be in your hand
  - Thud must be in your hand
  - Phyrexian Altar must be on the battlefield
  - You control another creature with power seven or greater.
[END OF COMBO PREREQUISITES]
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