Rising from the core of the world, he brings with him burning rocks of death.

So basically a rock monster or something.

Abilities
magma spray: once you turn it on it sprays at your cursor doing small amounts of damage. Stays active for several seconds.

Rift: creates a straight line rift in front of him, causing units to be knocked aside and take damage. Rift is not passable.

Boulder: Creates a small boulder of magma infront of him, gets bigger until it is released. Heads in a straight line and rolls over stuff.

Earthquake: Damages every unit on the field including friendlies.

This hero is just 4 random AoE nukes. What's the point?

Magma Spray is a clone of Lay Waste -- no need to rip off heroes that are already in the game.
Rift is a Fissure clone, which is awesome; but it doesn't synergize with this hero like it does with ES.
Boulder is basically a shockwave.
Earthquake is a generic AoE nuke, very boring and in no way should there be any abilities that can hurt allies (at least if it can be helped).