Spells listed in Orange are Dueling Spells.
Level One - Initial Transfiguration
Basic Object Transfiguration - Transfigure simple items
Level Two - Training Dueler Transfiguration
Basic Cross-Species Transfiguration - creatures must be similar in size and shape. Ex: Small cat to a small dog.
Basic Switching Spells - Switch a simple object with another simple object.
Advanced Object Transfiguration - Transfigure more advanced items.
Interspecies Transfiguration - Creatures must be of the same species.
Level Three - Junior Dueler Transfiguration
Advanced Cross-Species Transfiguration - Creatures should still be similar, but less so. Ex: Bird to a bat.
Enlargening
Shrinking
Level Four - Senior Dueler Transfiguration
Advanced Switching Spells - Switch more advanced objects.
Temporary Animagus Transformation - Transform into your animagus form for a limited time (Up to 5 posts or 3 turns during battle)
Level Six - Master Transfiguration
Animagus Transformation
Petrification
Absolute Switching Spells - Anything
Absolute Object Transfiguration - Anything
Absolute Cross-Species Transfiguration - Anything.