How can you create a combo with Ghalta and Mavren, Aggravated Assault, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Ghalta and Mavren, Aggravated Assault, Phyrexian Altar

Color identity: RGW
Mana cost: 
Steps:
  1. Declare at least six creatures you control as attackers.
  2. Ghalta and Mavren triggers, creating at least six 1/1 Vampire creature tokens.
  3. Move to your postcombat main phase.
  4. Activate Phyrexian Altar five times by sacrificing five Vampires, adding {3}{R}{R}.
  5. Activate Aggravated Assault by paying {3}{R}{R}, causing you to untap all creatures you control and to get an additional combat and main phase after this one.
  6. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colored mana
  - Infinite combat phases
  - Infinite creature tokens
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite mana creatures you control can produce
  - Infinite sacrifice triggers
  - Infinite untap of creatures you control[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least six creatures that can attack this turn.
  - An opponent cannot block and kill creatures you control.
[END OF COMBO PREREQUISITES]
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