When Arterial Alchemy enters, create a Blood token for each opponent you have. (It's an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")Blood tokens you control are Equipment in addition to their other types and have "Equipped creature gets +2/+0" and equip .
Whenever Scion of Opulence or another nontoken Vampire you control dies, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color."), Sacrifice two artifacts: Exile the top card of your library. You may play that card this turn.
Until end of turn, creatures you control gain menace and "Whenever this creature deals combat damage to a player, exile the top card of that player's library face down. You may look at and play that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell."
Target creature gets -3/-3 until end of turn. You may tap any number of untapped Vampire creatures you control. If you do, put a +1/+1 counter on each of those Vampires.
Attacking creatures you control have first strike.Whenever a Vampire you control deals combat damage to a player, put a +1/+1 counter on it.Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)