Fireball Damage addition not working

[DPPPPP]

my code works and shoots a fireball BUT it only does a small amount of damage. please help me

CODE:

on rightclick with a blaze rod:
if name of player's held item is "&eFireball &4Rod":
shoot an fireball at speed 10
on damage of entity by player:
if damage cause is fireball:
set damage to 50

 

[Xhield12]

on rightclick with a blaze rod:
if name of player's held item is "&eFireball &4Rod":
shoot an fireball at speed 10
on damage of entity by player:
if damage cause is fireball:
increase the damage to (fireball damage + x = 50)

i dont know if this will work, but its worth a shot

 

[DPPPPP]

i tried it but the error is on line 4 for some reason

 

[Xhield12]

i tried it but the error is on line 4 for some reason

you could try just checking if the players tool is the fireball rod. it would actually be better, because then ghast fireballs wouldnt destfoy people