Help making a custom item spell

Something like an instant AOE but with a projectile first, example:

The guy throws a hammer to the ground and when the hammer gets to the target Thunder Clap effect apears and units get damaged.

I want to know the name of a spell I could base of this, I already tried with shockwave, and got really weird results.

Before telling me I could use triggers consider that there is no (Special Effect move (Last created special effect to point) so projectiles won't work there.

Also remember that this is for an item, so the channel ability won't work either.

take a spell like stormbolt and use the missle art u want

no dmg

then make a trigger to create thunderclap special effect at target and use a pet to cast the real spell or just do it with a region


or dont care about the missle and just use frostnova^^

Nope, there is no way to get the target, this is an item spell, remember.

I won't use frost nova.