Here are a few Pictures to explain

This is your character !, the yellow outline/boxes signify tiles/cells

The Cactus shrubs represent the cast area, or Cast area posibilities.

Same as the second picture.
When a person casts a spell, his character freezes in place. and by doing that, he can use his arrow key to direct where he wants to cast the spell, ofcourse some spells like Heal and so on would be directly on character.
Anyways, what i can say to this is that it gives the player another thing to improve on, instead of jst clicking a skill and clicking the enemy, the player needs to work on his reaction time.
This is very similar to Area Of Effect spells.
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