Board Thread:Questions and Answers/@comment-30160565-20171230205913/@comment-4867780-20180103210722

@TheVoidWalker : everything does come from the writer, but they almost always justify it in-universe one way or another, that's what makes the story believable. When a totally unlimited power has no in-universe source whatsoever, it's means the writer handed it on a silver plate.

@DeathHorseman : in this case the power would just "stop working" altogether (close the valve) rather than not work on a specific target (resistance). But it's true that the inability to work independently may indirectly count as a limit/weakness, which may then be incompatible with the "supremelt almighty and invincible" definition (although one could argue that the power itself is still effectively almighty and invincible, as the "counter" interfere with the access rather than the power).