How can you create a combo with Animation Module, Mana Echoes, First Day of Class?
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[START OF COMBO]This combo can be formed with Animation Module, Mana Echoes, First Day of Class

Color identity: R
Mana cost: {2}{R}
Steps:
  1. Cast First Day of Class by paying {1}{R}.
  2. Put a +1/+1 counter on any creature you control.
  3. Animation Module triggers, causing you to pay {1} to create a 1/1 Servo artifact creature token.
  4. The Servo enters the battlefield, triggering Mana Echoes and First Day of Class
  5. Resolve the Mana Echoes trigger, adding at least {C}.
  6. Resolve the  First Day of Class trigger, putting a +1/+1 on the Servo.
  7. Animation Module triggers, causing you to pay {1} to create a 1/1 Servo artifact creature token.
  8. Repeat from step 4.[END OF COMBO STEPS]

Result:
  - Infinite leaves the battlefield
  - Infinite enters the battlefield
  - Infinite sacrifice triggers
  - Infinite death triggers
  - Infinite colorless mana
  - Infinite creature tokens
  - Infinite creatures tokens with haste[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Animation Module must be on the battlefield
  - Mana Echoes must be on the battlefield
  - First Day of Class must be in your hand
  - You have a way to put a +1/+1 counter on a creature you control.
[END OF COMBO PREREQUISITES]
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