How can you create a combo with Goblin Warrens, Mana Echoes, Skirk Prospector?
user
[START OF COMBO]This combo can be formed with Goblin Warrens, Mana Echoes, Skirk Prospector

Color identity: R
Mana cost: {2}{R}
Steps:
  1. Activate Goblin Warrens by paying {2}{R} and sacrificing two Goblins, creating three 1/1 Goblin creature tokens.
  2. When the Goblins enter the battlefield, Mana Echoes triggers three times, adding {C}{C}{C} for each Goblin you control.
  3. Activate Skirk Prospector by sacrificing a Goblin, adding {R}.
  4. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - All permanants must be on the battlefield
  - You control at least two Goblins.
[END OF COMBO PREREQUISITES]
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