The upright Magician is an all-knowing, all powerful person. They have every tool they need readily at their fingertips, and those tools might be something they know, something they have, or something they are.
In reverse, the Magician may not know how to use these powers, or might use them for manipulation, greed, or deviousness. There are a few other things that could be happening with the Magician Reversed:

1. You may be manipulating someone.
2. You may be having trouble connecting goals with the actions needed to achieve them.
3. You could be envious of someone else who seems easily able to achieve their dreams.
4. You or someone is acting unethically.

 
Questions answered by the Magician:

Who? A brilliant manipulator out of place for her or his age or position; an actual magician
What? A deviant behavior
Where? Somewhere mysterious, like Area 51
When? Soon; May and June; August and September
Why? “Until you realize how easy it is for your mind to be manipulated, you remain the puppet of someone else's game.” ~ Evita Ochel
Yes or No? No, or change your tactics
 
What should I clean?

• The most cluttered drawer or closet
• Your home office

     
Where are my keys?

• Where you last had a wicked thought
• The dining table

The Reversed Magician as:
...an action?

• Take an action toward your goal
• Take a chance on something bold
• Learn a magic trick

 
...a place in your house?

• The office
• The closets
• A crafts area
• The workshop

...a place in your city?

• A magic shop
• The library
• A craft store
• A school

...a place in the world?

• Egypt
• Italy
• India
• A haunted house

...something to eat?

• Potato chips
• Garlic
• Donuts
• Deli meat

...a color? Dark red, blue, purple
 
...a movie theme? Magic or manipulation

• Inception
• The Prestige
• Point Break
• Now you See Me

 
...a new career?

• Magician
• Construction
• IT helpdesk
• Amateur bowler
• Villain

Possible Major Arcana combinations with The Magician Reversed:
Reversed Fool: An inconsiderate swindler
Upright High Priestess: Out of touch with one’s inner voice
Reversed Empress: A nosy manipulator
Upright Emperor: An insecure father
Reversed Hierophant: A rebellion
Upright Lovers: Someone in a partnership is engaging in trickery or deviance
Reversed Chariot: No planning or direction
Upright Strength: Confident yet unfocused
Reversed Hermit: a lonesome villain
Upright Wheel: A period of misused skills
Reversed Justice: Dishonest, unfair
Upright Hanged One: A confusing sacrifice
Reversed Death: An extreme fear of change
Upright Temperance: One must be patient with the unknown
Reversed Devil: Breaking free of tricks
Upright Tower: A villain causes disaster
Reversed Star: Hopelessness, insecurity
Upright Moon: everything is an illusion
Reversed Sun: Unhappiness, needs therapy
Upright Judgement: karma catches up
Reversed World: A lack of skills leads to incompletion of projects
 
The Magician reversed before any card: Obtain more skills in (card)
The Magician reversed after any card: Evil, deviance
 
The Major Arcana represent significant life events. The Reversed Magician could indicate:

• A manipulative person coming into your life, or you become them
• A life event requiring more skills
• An illusion

The Applied Tarot Reversed won't be available in stores until later in 2021. For now, read all about the upright cards in The Applied Tarot:

The Magician is the all-knowing, all powerful person. The Magician has every tool they need readily at their fingertips. The Magician can conjure and create worlds.
The magic here is not mysterious, extraordinary, or fantastical, it is a practical application of reality. The Magician tells us to use the tools we already have to accomplish our task.
Our tools might be something we know, something we have, or something we are.
 
Questions answered by the Magician:
Who? Someone who knows a remarkable amount for her or his age or position; someone with a surprising talent; an actual magician
What? The use of an old skill in a new way
Where? An interesting shop you have never visited
When? Very soon; May and June; August and September
Why? Because you already have the skills you need
Yes or No? Yes
 
What should I clean?

• Organize your tools
• Your home office

     
Where are my keys?

• The tool box
• On your desk

The Magician as:
An action?

• Learn a magic trick
• Fix something broken
• Start a project

 
Place in your house?

• The office
• The kitchen
• A crafts area
• The workshop

Place in your city?

• A magic shop
• The library
• A craft store
• The office

Place in the world?

• Egypt
• Ireland
• India
• Haiti

Something to eat?

• Blueberries
• Garlic
• Chocolate
• Superfoods

A color? Aquamarine, blue, yellow
 
A movie theme? Magic, or already possessing the skills needed to win

• The Prestige
• The Martian
• Now you See Me
• Slumdog Millionaire

 
A new career?

• Magician
• Construction
• Network architecture
• Communications

Magician combinations
With Sun: Hard work and willpower leads to immense joy.
With Four of Wands: A dream is manifested at home; a home renovation project.
With Two of Cups: A partnership leads to successful business; creating strong bonds through hard work.
With Knight of Swords: A skilled person jumps into a career and finds instant success.
With Seven of Pentacles: You already possess the tools you need to reap great success this year; diligence will pay off.
 
The Magician before any card: You have all the tools you need to obtain  (card)
The Magician after any card: Mastery of a subject, resourcefulness
 
The Major Arcana represent significant, unchangeable life events.
The Magician could indicate:

• A skilled person, such as a professor or specialist coming into your life
• A life event requiring significant resources or knowledge
• A first glimpse of your future destiny
• A magic trick