card database mtg Magic: The Gathering Search – Ultra PRO International Magic: The Gathering - Wikipedia

This lets you fix your mana, largely due to our next entry

But it can also just be goofy fun

For each player who chose fame, gain control of a creature that player controls until end of turn

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

A boost of three mana, or one mana on the turn you play the Monolith, is far too dangerous to be allowed to survive