How can you create a combo with Geralf, the Fleshwright, Putrid Goblin, Bloodflow Connoisseur?
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[START OF COMBO]This combo can be formed with Geralf, the Fleshwright, Putrid Goblin, Bloodflow Connoisseur

Color identity: UB
Mana cost: 
Steps:
  1. Activate Bloodflow Connoisseur by sacrificing Putrid Goblin.
  2. When Putrid Goblin dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  3. When Putrid Goblin enters the battlefield, Geralf's second ability triggers, putting a number of +1/+1 counters on it equal to the number of other Zombies that entered the battlefield under your cotnrol this turn.
  4. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
  5. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite +1/+1 counters on Bloodflow Connoisseur
  - Infinite +1/+1 counters on Putrid Goblin
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Putrid Goblin does not have a -1/-1 counter on it.
  - You have had at least one Zombie enter the battlefield under your control this turn.
[END OF COMBO PREREQUISITES]
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