You may remember this question from Red vs Blue.
I'll name a couple for examples:
The ability to fly, but you can only fly true North.
Super strength, but you can only when standing completely still.
[spoiler]This is inspired by Peaches Pan Tao.[/spoiler]
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Edited by DJ: 9/27/2017 7:06:18 PMYou can see through walls, but only if you are wearing solar eclipse glasses.