[DOOM] DECORATE practice - Lightning Imp (Failure)

Motivated from Bloodborne, I wanted to make special projectile which spawns line of lightning bolts.
So, I made this 'Lightning Imp' who spawns line of lightning bolts. This lightning bolts are spawned by an invisible projectile, which fires yellow railguns towards sky.(A_SetPitch(-90) and A_CustomRailgun)
However... This imp is considered as a failure. A_CustomRailgun can't distinguish its master and enemies, so this guy can get hit by his own lightning, get damage, hurt and bleed, and even die.
To make him 'usable', I need to find any other method to express 'lightning' without Railgun.
+ I managed to fix the problem. 'Puff' was the solution. • [Doom] DECORATE practi...