Bloodline Necromancer, Molten Echoes, and Carrion Feeder

Prerequisites

• Bloodline Necromancer in hand
• Molten Echoes on the battlefield
• Carrion Feeder on the battlefield
• "Vampire" or "Wizard" chosen with Molten Echoes
• available

Steps

1. Cast Bloodline Necromancer by paying
2. Bloodline Necromancer enters the battlefield, triggering itself and Molten Echoes
3. Resolve the Bloodline Necromancer trigger, returning a Vampire or Wizard creature card from your graveyard to the battlefield
4. Activate Carrion Feeder by sacrificing Bloodline Necromancer, putting a +1/+1 counter on Carrion Feeder
5. Resolve the Molten Echoes trigger, creating a token copy of Bloodline Necromancer with haste
6. The token Bloodline Necromancer enters the battlefield, returning the nontoken Bloodline Necromancer from your graveyard to the battlefield
7. Repeat from step 2

Results

• Infinite +1/+1 counters on Carrion Feeder
• Infinite creature tokens with haste
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Return all Vampires and Wizards from your graveyard to the battlefield