Angel of Suffering

Flying
If damage would be dealt to you, prevent that damage and mill twice that many cards.

Shilgengar, Sire of Famine

Flying
Sacrifice another creature: Create a Blood token. If you sacrificed an Angel this way, create a number of Blood tokens equal to its toughness instead.
{W/B}{W/B}{W/B}, Sacrifice six Blood tokens: Return each creature card from your graveyard to the battlefield with a finality counter on it. Those creatures are Vampires in addition to their other types.

Orzhov Signet

Arcane Signet

{T}: Add one mana of any color in your commander's color identity.