Quote from joymonger »GB Rock has usually been a tough matchup for me because discard will destroy certain hands. Sometimes you keep a dream hand of double ritual, SSG, Chalice, Chandra, and Mountain, only to get Chandra Thoughseized and your Chalice getting blown up by Trophy. Now they have an active Liliana or a big Goyf and now your only out is Bridge and a finisher. Discard and mainboard removal that kills anything is good. Some games, Moon does nothing and is close to a dead card.