How Do I Summon A Ghast Fireball?

[ChocoPlays]

I'm trying to make a game but every time i put a fire charge into the spawn projectile game action in summons a blaze fireball any idea on how to make it a ghast fireball?

 

[ARMcPro]

I'm trying to make a game but every time i put a fire charge into the spawn projectile game action in summons a blaze fireball any idea on how to make it a ghast fireball?

put 2 Fire charges (so a stack of 2 items) to launch Ghast Fireball

 

[ARMcPro]

@blazebeckett here is a video about 5 projectiles