After play testing a full-power Grass Spellbook deck bricks (with Restart) are rare. If you open any of the 3 copies of Magician, Secrets, Grass, or if you open Fool (should you run it) and have Master in your hand you don't brick. The deck I run has 3 Fools, so 3/10 chance of outright not bricking and a 1/10 chance of roundabout not bricking. So, 2/5 chance per opening-hand card ain't bad.