How can you create a combo with Necromancy, Worldgorger Dragon?
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[START OF COMBO]This combo can be formed with Necromancy, Worldgorger Dragon

Color identity: BR
Mana cost: {2}{B}
Steps:
  1. Cast Necromancy by paying {2}{B}.
  2. Animate Dead enters the battlefield, returning Worldgorger Dragon from your graveyard to the battlefield attached with Necromancy.
  3. Worldgorger Dragon enters the battlefield, exiling all other permanents you control.
  4. Necromancy triggers, sacrificing Worldgorger Dragon.
  5. Worldgorger Dragon leaves the battlefield, returning all permanents exiled by it to the battlefield.
  6. Necromancy enters the battlefield, returning Worldgorger Dragon from your graveyard to the battlefield attached with Necromancy.
  7. Holding priority, activate all lands you control by tapping those, adding manas of any colors those lands can produce.
  8. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - Necromancy must be in your hand
  - Worldgorger Dragon must be in the graveyard
[END OF COMBO PREREQUISITES]
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