The Ultimate Nullifier Vs. The Source Wall
Reed Richards wants to go through/destroy/shatter/nullify the source wall for some reason. So he teleports to Galactus' ship and borrows the UN from him. After that he crosses universes untill he arrives at the DCU where the source wall is located. Then he stands firm with total concentration and pulls the trigger...
Does the UN's blast destroy/nullify the source wall?