Ashiok, Dream Render is a uncommon Legendary Planeswalker — Ashiok card from War of the Spark (WAR), collector number 228. Current market price: $1.37 (foil $7.28), TCGplayer market prices via Scryfall.
Spells and abilities your opponents control can't cause their controller to search their library. −1: Target player mills four cards. Then exile each opponent's graveyard.