Resolve the Flameshadow Conjuring trigger, causing you to pay ({R} magic symbol) to create a token copy of Bloodline Necromancer with haste.
When the token Bloodline Necromancer enters the battlefield, it triggers, returning the nontoken Bloodline Necromancer from your graveyard to the battlefield.
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.