Hastur, the King in Yellow

Partner with Zaina, the Bestest Friend.

This card's color is yellow. It cannot be other colors. Cast this spell only if you attacked with Zaina, the Bestest Friend this turn.

When Hastur enters or attacks, exile cards
from the top of each opponent's library equal
to the number of goaded creatures that player controls. Draw a card for each creature card exiled this way.