This is a spell book for element Earth. As you can see after first two spells, you get two branches in spell tree. Left and right. It's very important that you don't follow just one branch if you wish to be dominus minoris (you need first 10 spells, that means from both branches)
or finally dominus majoris (you need all 15 spells). The right branch (4,6,8,10,12,14) has stronger spells (and they cost more mana) at begining but the left branch (3,5,7,9,11,13,15) has one spell more, and that's the strongest spell. The Tree is now complete so you can see all of the Earth spells.
Spells by level:1. DustDescription: Dust blows biting clouds into your opponent's face.
Effect: Damage Earth 1 - 2 - Costs: 4 Mana - Level / max.: 1 / 3
Effect: Damage Earth 1 - 3 - Costs: 5 Mana - Level / max.: 2 / 3
Effect: Damage Earth 2 - 4 - Costs: 6 Mana - Level / max.: 3 / 3
2. Earth ArrowDescription: A basic Earth spell.
Effect: Damage Earth 1 - 3 - Costs: 8 Mana - Level / max.: 1 / 3
Effect: Damage Earth 1 - 4 - Costs: 10 Mana - Level / max.: 2 / 3
Effect: Damage Earth 2 - 6 - Costs: 13 Mana - Level / max.: 3 / 3
3. Earth SpikesDescription: Earth spikes causes huge thorns to shoot out of the ground, which then begin to stab your opponent.
Effect: Damage Earth 2 - 4 - Costs: 12 Mana - Level / max.: 1 / 3
4. EarthquakeDescription: Unsettle your opponent with a mild earthquake.
Effect: Damage Earth 3 - 5 - Costs: 16 Mana - Level / max.: 1 / 3