How can you create a combo with Mikaeus, the Unhallowed, Pith Driller, Phyrexian Altar?
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[START OF COMBO]This combo can be formed with Mikaeus, the Unhallowed, Pith Driller, Phyrexian Altar

Color identity: B
Mana cost: 
Steps:
  1. Activate Phyrexian Altar by sacrifiicing Pith Driller, adding one mana of any color.
  2. When Pith Driller dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  3. When Pith Driller enters the battlefield, it triggers, putting a -1/-1 counter on it.
  4. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Pith Driller does not have a +1/+1 counter on it.
[END OF COMBO PREREQUISITES]
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