Creature — Wall

Wall of Lost Thoughts

Wall of Lost Thoughts trading card
Creature — Wall3 exact printings

Defender (This creature can't attack.) When this creature enters, target player mills four cards. (They put the top four cards of their library into their graveyard.)

From Magic: The Gathering.

Exact printings

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o27fb0amvpb1hvbd4oegk.