need help with spell triggers

[snz.chaos]

i'm making a spell where a meteor would land and deal area damage and stun, nothing dificult... but the meteor is supposed to fragmentate and release burning rocks that would deal only damage and set units near the impact on fire and knockback them, also the shards (not sure if i can say shards) are supposed to have completely random height,timing and landing place.the knockback is not really needed, just an implement since i'm making an dynamic boss fight here.

 

[Meticulous]

Can I assume you already have the meteor base ability? And is the meteor a dummy unit, or is it just the Infernal ability?

 

[Spartipilo]

It's harder than you may think, but it's possible.

There are some Missile System in the Spell Section that may help you achieving what you want. There's one that actually splits the missile, so it may work for you. I forgot the name, so, look under Missile Systems

 

[snz.chaos]

Can I assume you already have the meteor base ability? And is the meteor a dummy unit, or is it just the Infernal ability?

since i need triggers for detection of the time to release the rocks, meteor is a dummy unit,and also the infernal ability does not fit the meteor that i want,need it red.