How can you create a combo with Krenko, Mob Boss, Sword of the Paruns, Mana Echoes?
user
[START OF COMBO]This combo can be formed with Krenko, Mob Boss, Sword of the Paruns, Mana Echoes

Color identity: R
Mana cost: 
Steps:
  1. Activate Krenko by tapping it, creating at least two 1/1 Goblin tokens.
  2. The Goblins enter the battlefield, triggering Mana Echoes at least two times, adding at least {C}{C}{C}{C}.
  3. Activate Sword of the Paruns by paying {3}, untapping Krenko.
  4. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite colorless mana
  - Infinite creature tokens
  - Infinite enters the battlefield
  - Infinite tap triggers
  - Infinite untap of creatures you control
  - Infinite mana creatures you control can produce[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Sword of the Paruns attached to Krenko.
  - You control at least one additional Goblin.
  - Krenko does not have summoning sickness.
[END OF COMBO PREREQUISITES]
assistant