Mase emptied his Cam'ron file, which is 20 years in the making, in the diss track "The Oracle."

The 42-year old claims  his fellow Children Of The Corn alum slept with his own sister and accuses Cam of snitching, getting a mutual friend killed and roping Diplomat Juelz Santana into a bad deal.

Cam had poked at Mase on his mixtape The Program, and "The Oracle" was the rapper-turned-pastor-who-apparently-still-raps' over-the-top comeback.

Cam jumped on Instagram this afternoon and said he was ready to return similar fire.

Good morning to u to betha...lol, Let's play nigga.. 😘

A post shared by @mr_camron on Nov 24, 2017 at 10:20am PST