If an opponent would mill one or more cards, they mill twice that many cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)

You have no maximum hand size. {T}: Add {C}.

Hive Mind — Whenever a player mills one or more creature cards, you create a 1/1 black Horror creature token. {1}, {T}: Target player mills three cards. Choose a Background (You can have a Background as a second commander.)

Blue spells you cast cost {1} less to cast.

Counter target spell. Its controller mills three cards.