Either one of the choices will be powerful and impact your game
Evoke When this creature enters, if was spent to cast it, search your library for a land card, reveal it, put it into your hand, then shuffle
Cards like Dictate of Erebos, Grave Pact, and Butcher of Malakir ensure any creature of ours that dies takes opposing bodies down with it
The answer was simple: just tweak the card to make it Arrest of Pillory of the Sleepless
While it normally provides the equipped creature with a +1/+1 counter whenever another creature dies if the equipped creature is a vampire, this number of counters gained this way is doubled, allowing for a single vampire to grow into a massive threat for a minimal cost.
Honorable Mentions and Cheaper Alternatives Modern Horizons 3 Landscapes Much like panorama's that came before them, the landscapes in MH3 provide colorless mana, can search for one of three basic land types, and have a cycling mode that is generally better than deck thinning