Any character in any story has a degree of power. Power can range from being powerless with no power at all (nothing is achievable) up to omnipotence where anything is achievable and perhaps the only limit would be the imagination of the omnipotent person. It is, obviously, the degree of power (especially lack of power) that makes the story interesting. Give any character omnipotence and they can solve their problem easily. They could also, interestingly, engineer situations so that others would experience a problem or drama of some sort.
Tools of omnipotence
If an outside 'person' - be it a godlike figure, deus ex machina, genii or whatever - gave a character instant omnipotence the character would probably experience a kind of 'option blindness' where they are unable to decide what to do due to their sudden array of options. I ivented a range of 'supertools' that would help the character choose what action to take.
The supertools serve several purposes:
They can be used to help a character solve problems/crises (for example, if a character was being attacked they can literally possess their attacker and thus stop the attack (and maybe make their attacker march off to the local police station)).
They can help the story creator set up a situation quickly - often a starting scenario in a story . So with the example of the scenario of the film 28 Days Later (where virtually all the population are infected with a virus that induces intense rage) the writer can set up such a scenario quickly and explore the ramifications of such a scenario.
They can make the story 'jump' from one scenario to a later scenario, allowing the story creator to explore different ideas and possibilities.
They can devise any concept, invention or occurences that could be in a story.
They can allow a character to play 'god' and set up difficult situations for other characters.
Effects by illusion
If I consider a concept from fiction - in this example 'the goose that lays a golden egg' - the supertools can be used to create the goose, or they can create the product of the concept, so that although I don't actually have a goose that lays golden eggs, the product of the supertool use creates the illusion that a goose lays golden eggs. The idea is that the supertools used in conjunction can create countless ways to create the golden egg illusion - or any other effect. Other ideas can also be suggested by use of the supertools.