mtg cards with shroud Silver Costume • Secret Lair Series (SLD) #915 At the beginning of your end step Athreos, Shroud-Veiled

Her special ability is FREEZE : Exert chosen opposing character

If you're sticking to the Vampire Aristocrats theme then the first cards I'd pick up would be Vampiric Tutor (finds Skullclamp and has Vampire in it!), Bloodletter of Aclazotz which doubles your drain / damage output on your turn absolutely wild, Bloodline Keeper provides sac fodder and a strong anthem, Legion's Landing nice thematic ramp, and Sorin, Imperious Bloodlord thematic ramp and removal

The deck also includes some excellent reprints that help streamline the process of building a party

With an Ink cost of 3, 2 Strength, 3 Willpower and 1 Lore, Ursula doesnt look great at first glance