How can you create a combo with Colfenor, the Last Yew, Myr Retriever, Ashnod's Altar, Cathodion?
user
[START OF COMBO]This combo can be formed with Colfenor, the Last Yew, Myr Retriever, Ashnod's Altar, Cathodion

Color identity: WBG
Mana cost: 
Steps:
  1. Activate Ashnod's Altar, sacrificing Cathodion to add {C}{C}.
  2. Cathodion and Colfenor trigger.
  3. Resolve the Cathodion trigger, adding {C}{C}{C}.
  4. Resolve the Colfenor trigger, returning Myr Retriever from your graveyard to your hand.
  5. Cast Myr Retriever.
  6. Activate Ashnod's Altar, sacrificing Myr Retriever to add {C}{C}.
  7. Myr Retriever triggers, returning Cathodion from your graveyard to your hand.
  8. Cast Cathodion.
  9. Repeat.[END OF COMBO STEPS]

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

Other prerequisites:
  - Colfenor, the Last Yew must be on the battlefield
  - Myr Retriever must be in the graveyard
  - Ashnod's Altar must be on the battlefield
  - Cathodion must be on the battlefield
[END OF COMBO PREREQUISITES]
assistant