Magical effects
Magic and magical theory Spells

Age Line

Explore
Characters Locations Magic Canon Events Things Creatures Essays
The Harry Potter Canon

"To ensure that no underage student yields to temptation. ...I will be drawing an Age Line around the Goblet of Fire once it has been placed in the entrance hall. Nobody under the age of seventeen will be able to cross this line."
-- Albus Dumbledore (GF16)

An Age Line is a thin golden line drawn on a floor which affects anyone too young to cross it.

References from the canon

Albus Dumbledore drew an Age Line around the Goblet of Fire to keep away anyone who was not yet seventeen years old. When the Weasley twins, who had taken an Ageing Potion to try to fool it, crossed over the Age Line, they were thrown back and sprouted long white beards (GF12).

Commentary

Notes

Although not shown in canon, one could presumably create an Age Line which could prevent someone to cross who was older than a given age.

From the Web

"Age Line" from Harry Potter Wiki

Pensieve (Comments)

Tags: protection tricks/trickery