How can you create a combo with Nekusar, the Mindrazer, Echo of Eons, Triumph of the Hordes?
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[START OF COMBO]This combo can be formed with Nekusar, the Mindrazer, Echo of Eons, Triumph of the Hordes

Color identity: UBRG
Mana cost: {6}{G}{G}{U}{U} if each opponent has three or more poison counters, or {8}{G}{G}{U}{U}{U} otherwise
Steps:
  1. Cast Triumph of the Hordes by paying {2}{G}{G}, giving creatures you control +1/+1 and infect until end of turn.
  2. Cast Echo of Eons by paying {4}{U}{U}, causing each player to discard their hands and draw seven cards.
  3. Nekusar triggers for each card your opponents draw.
  4. Resolve the first trigger, causing the opponent to get a poison counter.
  5. If the opponent has ten or more poison counters, they lose the game as a state-based action.
  6. Repeat from step 4 for each remaining trigger.
  7. If needed, cast Echo of Eons from your graveyard for its flashback cost by paying {2}{U}, causing each player to discard their hands and draw seven cards.
  8. Repeat from step 3.[END OF COMBO STEPS]

Result:
  - Each opponent loses the game[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Nekusar, the Mindrazer must be on the battlefield
  - Echo of Eons must be in your hand
  - Triumph of the Hordes must be on the battlefield
[END OF COMBO PREREQUISITES]
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