Void Extrapolator [Reality Fracture]

This creature enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Threshold — This creature gets +1/+1 as long as there are seven or more cards in your graveyard.

Omit Variables (U/B)

Sorcery

Mill three cards. (Put the top three cards of your library into your graveyard.)