The Trojan Horse.

It was the wooden statue that is said to have brought an end to the long Trojan War.

At the time, a false prophecy spread in Troy that if the wooden horse statue was brought inside the city, Troy would be victorious.

Believing the enemy's prophecy, Troy brought the statue of the horse, unaware that the enemy's elite soldiers were hidden inside it. The result was the fall of the city that had been protected for ten years.

The deeper the enemy infiltrated, the more deadly they became, like spies.

However.

‘If you know the true identity, it’s a different story.’