Illusory Dragon

level 8 - illusion

Casting Time: 1 action

Range: 120 feet

Components: S

Duration: Concentration, up to 1 minute

Description not available (not OGL).
But here is a summary:

Creatures that see this illusory Huge dragon must succedd on a Wis. save or be frightened for 1 min.

Wizard

Xanathar´s Guide to Everything