Relic Golem

This creature can't attack or block unless an opponent has eight or more cards in their graveyard. {2}, {T}: Target player mills two cards. (They put the top two cards of their library into their graveyard.)

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o38bw1591pb1he30vmgpq.