Preach Modesty (Red)

Preach Modesty triggers at the beginning of your action phase. This is an optional effect: You choose whether or not to remove a balance counter from it at the time the triggered effect resolves. If you don’t remove a balance counter, you will destroy Preach Modestry.

As long as Preach Modesty is in the arena, hero abilities can’t create cards, including those on your hero. Examples of hero abilities that create cards include, but are not limited to, those that create cards in the arena (e.g. Briar, Cindra, Olympia, etc.) or create cards in the hand (e.g. Zen)