For more ideas and to highlight a feature that you may not be aware of I've created a few more spells that, once again, anyone is free to use or take inspiration from.

[hider=Combination Spells]
Change-World

Purgatory: This spell causes a sphere around the target to turn into fire: transforming earth, air, or anything else into fire scorching everything within. The user maintains some control over the fire, allowing them to move it to adjust for their target; in addition it requires a few seconds to cast the spell

High-Change

Assimilate: This spell allows the user to convert physical objects into mana that they absorb, allowing them to power their spells with it. The duration to convert depends on how durable as well as how large the object is. 

Timespace-Mind

Substitution Jutsu: A spell inspired by too much time watching anime, it allows the user to teleport short distances easily and/or create an illusion that follows a basic command that vanishes receiving damage.

Mind-Timespace

Infinite Prison: A cruel spell that causes everything within in area to experience time at a greatly diminished rate: in addition those within are affected by an illusion that causes them to think they are moving even more slowly. This drains mana quickly but can cause mental damage quite easily by causing someone to spend days waiting in for what amounts to less than minute as well as suppressing enemies. 


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