How can you create a combo with Colfenor, the Last Yew, Pawn of Ulamog, Walking Ballista?
user
[START OF COMBO]This combo can be formed with Colfenor, the Last Yew, Pawn of Ulamog, Walking Ballista

Color identity: WBG
Mana cost: 
Steps:
  1. Cast Walking Ballista by paying {0}.
  2. Walking Ballista enters the battlefield and dies as a state-based action due to having zero or less toughness.
  3. Colfenor and Pawn of Ulamog trigger.
  4. Resolve the Colfenor trigger, returning nothing from your graveyard to your hand.
  5. Resolve the Pawn of Ulamog trigger, creating a 0/1 Eldrazi Spawn creature token.
  6. Activate the Eldrazi Spawn by sacrificing it, adding {C}.
  7. The Eldrazi Spawn dies, triggering Colfenor, returning Walking Ballista from your graveyard to your hand.
  8. Repeat.
  9. Once you have a large amount of {C}, you may cast Walking Ballista using an arbitrarily large amount of mana, then use its ability to deal infinite damage to any target(s).[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Walking Ballista
  - Infinite colorless mana
  - Infinite damage
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers
  - Infinite storm count[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - Colfenor, the Last Yew must be on the battlefield
  - Pawn of Ulamog must be on the battlefield
  - Walking Ballista must be in your hand
[END OF COMBO PREREQUISITES]
assistant