Grave Researcher // Reanimate

Oracle Text

[Grave Researcher]
At the beginning of your upkeep, surveil 1. Then if there are three or more creature cards in your graveyard, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

[Reanimate]
Put target creature card from a graveyard onto the battlefield under your control. You lose life equal to that card's mana value.