Thaumaturgs' Focus

Thaumaturgy is an elemental based magic. The root of this magic is the Thaumaturgs' Focus. This spell is the where all elemental force, which forms the spell, is conjured from. 

The caster, upon learning this spell, has access to 100 units of energy. This energy is spent by casting using Thaumaturgs' Focus. This energy is increased every level by 25.

To use this spell, the caster must have access to the element they wish to manipulate. For example; if the caster wishes to throw a rock they would need access to the rock and air. The caster would then use some of there energy units to then lift the rock and throw it. Depending on the size of the rock, the DM will decide how many points to deduct. The PC would then make a hit roll (1d20+dex modifier) and the damage would then also be decided fairly by the DM. 

Every round the PC will roll 1d8 to decide how many energy points will regenerate. A PCs energy is completely restored upon a short rest.

A bit further on, at higher levels, the abilities of this spell can get more complicated. For instance, with the element of air and enough energy, the caster could levitate for a short period. Or, multiple elements may be mixed to form a far more complex spells. The possibilities really are only limited by the casters creativity and skill.