Bloodflow Connoisseur + Cauldron of Souls Combos

8 known combos featuring both cards in Commander

Infinite LTB Infinite ETB Infinite sacrifice triggers Infinite death triggers Infinite +1/+1 counters on a creature

Combo 1 with Dross Scorpion + Mycosynth Lattice

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite +1/+1 counters on a creature
Steps
  1. Activate Cauldron of Souls by tapping it, giving the creature with bloodthirst persist until end of turn.
  2. Activate Bloodflow Connoisseur by sacrificing the creature with bloodthirst.
  3. When the creature dies, its persist ability and Dross Scorpion trigger.
  4. Resolve the persist trigger, returning the creature from your graveyard to the battlefield, which enters the battlefield with at least one +1/+1 counter on it due to its bloodthirst ability.
  5. Resolve the Dross Scorpion trigger, untapping Cauldron of Souls.
  6. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
  7. Repeat.

Combo 2 with Dross Scorpion + Biotransference

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite +1/+1 counters on a creature
Show steps
  1. Activate Cauldron of Souls by tapping it, giving the creature with bloodthirst persist until end of turn.
  2. Activate Bloodflow Connoisseur by sacrificing the creature with bloodthirst.
  3. When the creature dies, its persist ability and Dross Scorpion trigger.
  4. Resolve the persist trigger, returning the creature from your graveyard to the battlefield, which enters the battlefield with at least one +1/+1 counter on it due to its bloodthirst ability.
  5. Resolve the Dross Scorpion trigger, untapping Cauldron of Souls.
  6. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
  7. Repeat.

Combo 3 with Dross Scorpion + Encroaching Mycosynth

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite +1/+1 counters on a creature
Show steps
  1. Activate Cauldron of Souls by tapping it, giving the creature with bloodthirst persist until end of turn.
  2. Activate Bloodflow Connoisseur by sacrificing the creature with bloodthirst.
  3. When the creature dies, its persist ability and Dross Scorpion trigger.
  4. Resolve the persist trigger, returning the creature from your graveyard to the battlefield, which enters the battlefield with at least one +1/+1 counter on it due to its bloodthirst ability.
  5. Resolve the Dross Scorpion trigger, untapping Cauldron of Souls.
  6. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
  7. Repeat.

Combo 4 with Vohar, Vodalian Desecrator + Haunted One + Deceiver Exarch

Results: Infinite card draw · Infinite draw triggers · Infinite looting · Near-infinite +1/+1 counters on a creature · Near-infinite death triggers · Near-infinite ETB · Near-infinite LTB · Near-infinite power for certain creatures until end of turn · Near-infinite sacrifice triggers
Show steps
  1. Activate Vohar's first ability by tapping it.
  2. Vohar triggers, giving creatures you control that share a creature type with it +2/+0 and undying until end of turn.
  3. Resolve the Vohar ability from step 1, causing you to loot.
  4. Activate Bloodflow Connoisseur by sacrificing Deceiver Exarch.
  5. When Deceiver Exarch dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
  6. When Deceiver Exarch enters the battlefield, it triggers, untapping Cauldron of Souls.
  7. Resolve the Bloodflow Connoisseur ability from step 4, putting a +1/+1 counter on it.
  8. Activate Cauldron of Souls by tapping it, giving Deceiver Exarch persist until end of turn.
  9. Activate Bloodflow Connoisseur by sacrificing Deceiver Exarch.
  10. When Deceiver Exarch dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  11. When Deceiver Exarch enters the battlefield, it triggers, untapping Vohar.
  12. Resolve the Bloodflow Connoisseur ability from step 9, putting a +1/+1 counter on it.
  13. Repeat.

Combo 5 with Szarel, Genesis Shepherd + Clock of Omens

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite +1/+1 counters on a creature
Show steps
  1. Activate Cauldron of Souls by tapping it, giving two nontoken artifact creatures persist until end of turn.
  2. Activate Clock of Omens by tapping the nontoken artifact creatures, untapping Cauldron of Souls.
  3. Activate Bloodflow Connoisseur by sacrificing one of the nontoken artifact creatures that doesn't have a -1/-1 counter on it.
  4. When the creature dies, its persist ability and Szarel triggers.
  5. Resolve the persist trigger, returning the creature from your graveyard to the battlefield.
  6. Resolve the Szarel trigger, putting a number of +1/+1 counters on the other artifact creature.
  7. Resolve the Bloodflow Connoisseur ability.
  8. Repeat from step 3 once, instead sacrificing the creature who had counters placed on it in step 6.
  9. Repeat from step 1.

Combo 6 with Dross Scorpion + Arsenal Thresher

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite +1/+1 counters on a creature
Show steps
  1. Activate Cauldron of Souls by tapping it, giving Arsenal Thresher persist until end of turn.
  2. Activate Bloodflow Connoisseur by sacrificing Arsenal Thresher.
  3. When Arsenal Thresher dies, its persist ability and Dross Scorpion trigger.
  4. Resolve the Dross Scorpion trigger, untapping Cauldron of Souls.
  5. Resolve the Arsenal Thresher trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it, and then choosing to reveal at least one artifact card from your hand to remove the -1/-1 counter.
  6. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it.
  7. Repeat.

Combo 7 with Gerrard, Weatherlight Hero + Extruder

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers
Show steps
  1. Activate Cauldron of Souls by tapping it, giving Gerrard persist until end of turn.
  2. Activate Extruder by sacrificing Cauldron of Souls, putting a +1/+1 counter on Gerrard.
  3. Activate Bloodflow Connoisseur by sacrificing Gerrard.
  4. When Gerrard dies, it and its persist ability trigger.
  5. Resolve the Gerrard persist trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  6. Resolve the second Gerrard trigger, failing to exile it as it has left your graveyard, and returning Cauldron of Souls from your graveyard to the battlefield.
  7. Resolve the Bloodflow Connoisseur ability from step 3, putting a +1/+1 counter on it.
  8. Repeat.

Combo 8 with Derevi, Empyrial Tactician + Aerith Gainsborough

Results: Infinite LTB · Infinite ETB · Infinite sacrifice triggers · Infinite death triggers · Infinite +1/+1 counters on a creature · Infinite +1/+1 counters on legendary creatures you control
Show steps
  1. Activate Cauldron of Souls by tapping it, giving Derevi and Aerith persist until end of turn.
  2. Activate Bloodflow Connoisseur by sacrificing Derevi.
  3. When Derevi dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  4. When Derevi enters the battlefield, it triggers, untapping Cauldron of Souls.
  5. Activate Bloodflow Connoisseur by sacrificing Aerith.
  6. When Aerith dies, it triggers twice.
  7. Resolve Aerith's persist trigger, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
  8. Resolve the second Aerith trigger, putting a +1/+1 counter on each legendary creature you control, thus removing the -1/-1 counters from Aerith and Derevi.
  9. Resolve the Bloodflow Connoisseur abilities from steps 2 and 5.
  10. Repeat.
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