Bloodflow Connoisseur + Cathars' Crusade Combos

2 known combos featuring both cards in Commander

Infinite LTB Infinite ETB Infinite sacrifice triggers Infinite death triggers Infinite storm count

Combo 1 with Crystalline Crawler + Evolution Witness

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite storm count · Infinite +1/+1 counters on creatures you control
Steps
  1. Cast the creature with mana value 1 or less from your hand by paying its mana cost.
  2. When the creature enters, Cathars' Crusade triggers.
  3. Holding priority, activate Bloodflow Connoisseur by sacrificing the creature.
  4. Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control.
  5. Evolution Witness triggers, returning the creature with mana value 1 or less from your graveyard to your hand.
  6. Activate Crystalline Crawler by removing a +1/+1 counter from it, adding one mana of any color.
  7. Repeat.

Combo 2 with Dargo, the Shipwrecker + Crystalline Crawler

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite storm count · Infinite commander casts · Infinite +1/+1 counters on creatures you control
Show steps
  1. Cast Dargo from the command zone by paying {R}.
  2. When Dargo enters the battlefield, Cathars' Crusade triggers, putting a +1/+1 counter on each creature you control.
  3. Activate Bloodflow Connoisseur by sacrificing Dargo.
  4. Choose to return Dargo from your graveyard to the command zone.
  5. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
  6. Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {R}.
  7. Repeat.
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