Forum:Scrub Raid vs. Royal Decree Chain

Okay here is the chain in dispute:

Chain 1) Threatening Roar is activated Chain 2) Royal Decree is flipped faced up Chain 3) Activate a face-up scrub raid to send threatening roar to the graveyard.

My questions is does threatening roar go through? Since threatening roar is now in the graveyard and royal decree only negate face-up trap cards on the field, my judge ruled that it does go through. Any thoughts??