Different types of spells

Some kind of shooting skill, which should feel like in Fable III.

You charge some form of barely stable energy. When you release it, due to its instability you can shoot it away at high speed. It is possible to charge this spell, only the energy will get more and more unstable.

Some kind of very simple minigame could make this instability real to the player. This gets harder with increasing instabiltiy. Also some blurring effects should occur. The player needs to focus on the casting so can't focus as much on the battlefield.

Suggestion for the minigame: Can't move while charging. Movement keys are used to move a point on a circle. There is your focus point, which you control, and a energy focus point, which is a second point that moves away from the focus point, faster when distance is greater. When the 2 points coincide, they are in a metastable state. This state gets less stable when the energy gets less stable.

For short bursts this should be easy, and it should also be able to shoot bursts like this while moving and doing combos.