How can you create a combo with Chainer, Dementia Master, Wurmcoil Engine, Phyrexian Altar, Verdant Sun's Avatar?
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[START OF COMBO]This combo can be formed with Chainer, Dementia Master, Wurmcoil Engine, Phyrexian Altar, Verdant Sun's Avatar

Color identity: BG
Mana cost: {B}{B}{B}
Steps:
  1. Activate Phyrexian Altar twice by sacrificing the Wurm tokens, adding {B}{B}.
  2. Activate Chainer by paying {B}{B}{B} and 3 life, putting Wurmcoil Engine from your graveyard onto the battlefield.
  3. When Wurmcoil Engine enters the battlefield, Verdant Sun's Avatar triggers, causing you to gain life equal to Wurmcoil Engine's toughness.
  4. Activate Phyrexian Altar by sacrificing Wurmcoil Engine, adding {B}.
  5. When Wurmcoil Engine dies, it triggers, creating two 3/3 Wurm artifact creature tokens.
  6. When the Wurms enter the battlefield, Verdant Sun's Avatar triggers twice, causing you to gain life equal to the Wurms' combined toughness.
  7. Activate Phyrexian Altar twice by sacrificing the Wurms, adding {B}{B}.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite sacrifice triggers
  - Infinite death triggers
  - Infinite lifegain triggers
  - Infinite lifegain[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Your life total is at least 4.
[END OF COMBO PREREQUISITES]
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