Earth magic example tree.
The solid crust shell of soil and rock around the planets molten core is the basis of earth magic. Earth magic does more physical damage than any other magic type just because the ground is the most solid thing that can be encountered.
 

1 Point earth magic.

  
Rolling stones
(Summon element)
 Summoning several rounded boulders from a nearby source and sets them rolling at the target with some force, things they destroy traveling with them. These boulders are real and tangible, they cannot be countered once set rolling as the spell is already over.
Stone skin
(Bless/Curse)
Passed by touch this magic grants the user an increase in the strength of their skin to the point where they become wrapped in rock. Simple blows deflect off them like they would off a rock. Gradually the rock expands and falls away revealing the target's natural form underneath probably unharmed for the magic. Breaking though the armor is still possible, easily in some cases for the person within is still flesh and blood.
Walking rock
(Summon Elemental Spirit)

Fallen boulders in the area gather together into a roughly humanoid creature roughly twice as tall as the average man. The creature pound/runs along towards the target and procedes to beat whatever it is sensless with bulky stone fists. Walking rocks are surpsingly fast but only last as long as the caster's natural energy will allow. Their blows are powerful and crushing but slow enough for fast characters to avoid with little trouble.
Tremor
(Bless/Curse)
 A staff with a written lable is tapped on the ground causing it to shudder voilently under the force. The shudder knocks over poeple and buildings often damaging more of the strong solid people that the fast nimble people. This spell only affects the ground and minerals from the ground. (Metal specificly. Allowing the spell to shake mecka apart in a single blow.)

2 Point earth magic.

  
Really the name says it all, a huge rock,( The size of a 3 bedroom house.) dropped on the target. The rock remains there until destroyed or used to summon walking rocks or a stone titan.
Mountain fall
(Summon element)
With a simple touch the caster makes the person slow quickly. Eventualy the reason for the slow becomes obvious as the area around the person donates small stones and dust to them until they are completely wrapped in a nearly solid stone. The stone breaks with blows from the outside and will eventualy break to free the person inside.
Petrify
(Bless/Curse)
BY placing the word titan on a piece of paper the caster can afix the paper on a target and grant it giants strength. (Strength bonus equal to their willpower.) This strength lasts for as long as the paper is ledgible and attached. (24 hours at most.)
Titan's strength
(Bless/Curse)
 

3 Point earth magic.

  
Stone spike
(Summon element)
 Large stone spikes like the teeth of some ancient dragon spike up through the ground, sharp enough and with enough force to implae people and tanks. (Though the spikes are as wide as a car they narrow at the tip like spikes.) The number of spikes is determined by the casters willpower, obviously the more spikes the greater the chance that somebody will be hit. The spikes remain on the battlefield until used or broken.
Stone titan
(Summon Elemental Spirit)
A larger version of walking rock, though larger doesnt really describe the HUGE size increase. A stone titan can easily crush a walking rocks under its foot. Its four huge limbs pound the ground with crushing force able to crush pretty much anything as it marches wherever it likes. (Normally over the target and carrying on to the nearest mountains leaving a huge path of destruction.
 

4 Point earth magic.

  
This spell makes the tremor weapon blessing look patheticly weak. THe massive ground upheaval and shaking can be felt for miles around and the ground int he battlefield itself breaks up into chunks which bet jumbled and shaken about. Its a bad thing to be on the ground when this one goes off.
Quake
(Summon element)