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

Color identity: GUR
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. Razorkin Needlehead 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:
  - Razorkin Needlehead must be on the battlefield
  - Echo of Eons must be in your hand
  - Triumph of the Hordes must be in your hand
[END OF COMBO PREREQUISITES]
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