Look at the pretty sparkles that spell made.
Magic can do just about anything a person can think of; mess with time, change colors, injure and incapacitate people in various ways. It can also be jazzed up in a great variety of ways; a stunning spell could get red sparks, sound effects, and maybe a halo around the wand firing the spell to complement the otherwise mundane visual of someone slumping over. This does not include effects that have a solid grounding in what the spell actually does- a freezing spell can reasonably look like a rush of snowy air, but if it starts sparking and glowing it's going for style points. Related to Power Glows, Instant Runes, and Everything's Better with Sparkles. Subtrope of Unrelated Effects and Rule of Cool.
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