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Draconifors
Incantation	Draconifors; (DRA-CON-ifors)
Type	Transfiguration
Hand Movement	Slash your wand at the statue
Light	Fire Red
Effect	Turns statues into real dragons

Hermione Granger: "It was great! Now I can turn anything into dragons!"

Ronald Weasley: "Those flying, roaring, burn-the-village dragons?"

Hermione Granger: "No, only small transfigured dragons."

— Hermione and Ron discussing Draconifors^[src]

Draconifors is a Transforming spell that turns statues of dragons into real dragons. The caster 'swipes' their wand through the air and a ball of fire is shot from it at the statue, which will immediately animate and breathe fire. A Draconifors spellbook was found by Hermione Granger in Professor Cuthbert Binns's History of Magic classroom in 1993.

Behind the scenes

In the PC version of Harry Potter and the Prisoner of Azkaban, Draconifors is a spell learned in Transfiguration class. Only Hermione Granger can use it. It turns statues of dragons into real dragons, which can then be controlled by the player.
In the PS2, GC, and Xbox versions of the game, Hermione Granger can use the spell on dragon statues, which then breathe fire. The ensuing fire then consumes wall hangings to reveal secret passageways.
It is unknown if conjured dragon statues will suffice for the spell to work on them, but this is possible.

From Latin draco meaning dragon, and fors meaning luck, chance which is a suffix often used for transfiguration spells.

Transfiguration (class)

Professors: Albus Dumbledore · Minerva McGonagall
Textbooks: A Beginner's Guide to Transfiguration · Intermediate Transfiguration · A Guide to Advanced Transfiguration
Known practitioners: Emeric Switch · Circe · Falco Aesalon · Mirabella Plunkett · Thaddeus Thurkell ·
Transfiguration spells studied at Hogwarts: Chair to cat · Match to needle · Snail to Teapot · Teacup to Rat · Switching Spell · Transforming Spell · Avifors Spell · Mice to Snuffboxes · Beetle Buttons · Rabbit Slippers · Teapot to tortoise · Draconifors Spell · Lapifors Spell · Vanishing Spell · Vera Verto · Owl to opera glasses · Guinea fowl to guinea pig · Hedgehog to pincushion · Small Child to Rat · Meddling Man to Monkey
Branches of Transfiguration: Transformation · Vanishment · Conjuration · Untransfiguration

Draconifors

Incantation	Draconifors (DRA-CON-ifors)
Type	Transfiguration
Hand Movement	Slash your wand at the statue
Light	Fire Red
Effect	Turns statues into real dragons