Older vampires are usually more cautious than the newly-sired, calling upon ancient magic for which neonates lack patience.

Elusive Tormentor

{1}, Discard a card: Transform Elusive Tormentor.

Insidious Mist

Hexproof, indestructible
Insidious Mist can't block and can't be blocked.
Whenever Insidious Mist attacks and isn't blocked, you may pay {2}{B}. If you do, transform it.

Elusive Tormentor // Insidious Mist

{1}, Discard a card: Transform Elusive Tormentor. 

 Hexproof, indestructible
Insidious Mist can't block and can't be blocked.
Whenever Insidious Mist attacks and isn't blocked, you may pay {2}{B}. If you do, transform it.

Elusive Tormentor // Insidious Mist

Creature — Vampire Wizard // Creature — Elemental