Could we use the animation from Stone Spikes, but with a different texture? That is, instead of stones, let bones emerge or something similar. We could also add a cropped effect on top.

This is a good idea, but I'm afraid I won't be able to do it yet, as I said, the hit effect is tied to a point on the creature, and creatures come in different sizes – it's not a given that the spikes won't start above ground level.

We can try to avoid this by changing the scale – making the effect larger, but then we definitely won't be able to recolor the spikes into bones; their angularity will be noticeable. We can reduce the number of spikes. I decided that leaving 3 large spikes and adding an effect of summoning an earth elemental on top would be very cool, but it would be better to give this to some geomancers.

Added 12 minutes ago
I'm currently considering options; after all, a direct shot is easier to handle – you can port any object and make it a projectile... or maybe just make a glowing ball? Although I'll still think about it; there are skulls and other things; you can even create some kind of blue, green, or purple light from the sky, although this is more suitable for priests.

Added 1 hour 27 minutes ago
Interestingly, the mage hero doesn't have a projectile; he only uses the trail of the projectile, and it's located in the Warlock folder. There's also a projectile there, like the Warlock's, but it's even more garish – blue with a purple "tip."