How can you create a combo with Door to Nothingness, Ashnod the Uncaring, Annie Joins Up?
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[START OF COMBO]This combo can be formed with Door to Nothingness, Ashnod the Uncaring, Annie Joins Up

Color identity: WUBRG
Mana cost: {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}
Steps:
  1. Activate Door to Nothingness by paying {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}, tapping and sacrificing it, targeting an opponent.
  2. Ashnod the Uncaring triggers twice.
  3. Resolve the first Ashnod the Uncaring trigger, copying the Door to Nothingness ability, targeting an opponent.
  4. Resolve the Door to Nothingness ability created in step 3, causing the targeted opponent to lose the game.
  5. Resolve the second Ashnod the Uncaring trigger, copying the Door to Nothingness ability, targeting an opponent.
  6. Resolve the Door to Nothingness ability created in step 5, causing the targeted opponent to lose the game.
  7. Resolve the Door to Nothingness ability in step 1, causing the targeted opponent to lose the game.[END OF COMBO STEPS]

Result:
  - Up to three target opponents lose the game[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
[END OF COMBO PREREQUISITES]
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