How can you create a combo with Ghoulcaller Gisa, Thornbite Staff, Phyrexian Altar, Liliana's Mastery?
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[START OF COMBO]This combo can be formed with Ghoulcaller Gisa, Thornbite Staff, Phyrexian Altar, Liliana's Mastery

Color identity: B
Mana cost: {B}{B}
Steps:
  1. Activate Ghoulcaller Gisa's ability to sacrifice a creature and create at least 1 zombie.
  2. Thornbite Staff allows Ghoulcaller Gisa to untap with her ability.
  3. Sacrifice the zombie to Ghoulcaller Gisa again to create 3 zombies.
  4. Thornbite Staff untaps Ghoulcaller Gisa again.
  5. Sacrifice a zombie to Phyrexian Altar to add {B} to your mana pool.
  6. Activate Ghoulcaller Gisa's ability to sacrifice a zombie and create 3 zombies.
  7. Thornbite Staff untaps Ghoulcaller Gisa again.
  8. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - Thornbite Staff attached to Ghoulcaller Gisa.
  - 1 other creature on the battlefield.
[END OF COMBO PREREQUISITES]
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