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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Let say you walk three feet, and have the power to teleport. However, you can only teleport to those three feet you walked previously.