Sek'Kuar, Deathkeeper, Cryptolith Rite, Nether Traitor, and Bloodflow Connoisseur

Prerequisites

• Sek'Kuar, Deathkeeper on the battlefield
• Cryptolith Rite on the battlefield
• Nether Traitor on the battlefield
• Bloodflow Connoisseur on the battlefield

Steps

1. Activate Bloodflow Connoisseur by sacrificing Nether Traitor
2. Sek'Kuar triggers, creating a 3/1 Graveborn creature token creature with haste
3. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it
4. Activate the Graveborn token using the ability from Cryptolith Rite by tapping it, adding
5. Activate Bloodflow Connoisseur by sacrificing the Graveborn token
6. Nether Traitor triggers, causing you to pay to return it from your graveyard to the battlefield
7. Resolve the Bloodflow Connoisseur ability, putting a +1/+1 counter on it
8. Activate Nether Traitor using the ability from Cryptolith Rite by tapping it, adding one mana of any color
9. Repeat

Results

• Infinite +1/+1 counters on Bloodflow Connoisseur
• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers