PROJ EXTRA
PROJ_EXTRA is a defineprojectile property used to set the damage strength of a projectile.
Syntax is:
defineprojectile <tile number> PROJ_EXTRA <number>
Where <number> is the damage strength.
Negative numbers do not work to create a “healing” projectile. You must set this value to 0 and have the actor that is hit manually add health back to itself.