Bloodline Necromancer, Flameshadow Conjuring, and Phyrexian Altar

Prerequisites

• Bloodline Necromancer in hand
• Flameshadow Conjuring on the battlefield
• Phyrexian Altar on the battlefield
• "Vampire" or "Wizard" chosen with Flameshadow Conjuring
• available

Steps

1. Cast Bloodline Necromancer by paying
2. When Bloodline Necromancer enters the battlefield, it and Flameshadow Conjuring trigger
3. Resolve the Bloodline Necromancer trigger, returning a Vampire or Wizard creature card from your graveyard to the battlefield
4. Activate Phyrexian Altar by sacrificing Bloodline Necromancer, adding
5. Resolve the Flameshadow Conjuring trigger, causing you to pay to create a token copy of Bloodline Necromancer with haste
6. When the token Bloodline Necromancer enters the battlefield, it triggers, returning the nontoken Bloodline Necromancer from your graveyard to the battlefield
7. Repeat from step 2

Results

• Infinite colored mana
• 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