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Chapter 8: Playing the Game / Area

Emanation

Source Player Core pg. 428
An emanation issues forth from each side of your space, extending out to a specified number of feet in all directions. For instance, the bless spell’s emanation radiates 15 or more feet outward from the caster. Because the sides of a creature’s space are the starting point for the emanation, an emanation from a Large or larger creature affects a greater overall area than that of a Medium or smaller creature. Unless the text states otherwise, the creature creating an emanation effect chooses whether the creature at its center is affected.