@BrailSayslvl 14 illusory reality+illusion of adamantine wall, incoming siege boulder/ballista. What happens? "lvl 14 illusory reality+illusion of adamantine wall, incoming siege boulder/ballista. What happens?"
It could hit the wall.
— Jeremy Crawford (@JeremyECrawford) January 21, 2015
@BrailSays "wall hp? no damage ?"
The wall is real, so the DM would treat it like any other wall.
— Jeremy Crawford (@JeremyECrawford) January 21, 2015