Veinwitch Coven | Phyrexian Altar | Vein Ripper (and one other card)

One-drop creature with a second body

Cards

Activate
Phyrexian Altar by sacrificing the one-drop creature, adding ({B} magic symbol) .
When that creature dies, it and
Vein Ripper trigger.
Resolve the creature's ability, creating a creature token.
Resolve the
Vein Ripper ability, gaining at least one life and causing at least one opponent to lose at least one life.
When you gain life,
Veinwitch Coven triggers, causing you to pay ({B} magic symbol) to return the one-drop creature from your graveyard to your hand.
Activate
Phyrexian Altar by sacrificing the token creature, adding one colored mana.
Cast the creature by paying one mana.
Repeat.

This combo has been estimated to be Exhibition (Bracket 1+).