Forum:Nordic Relic Laevateinn vs obelisk the tormentor

So I was dueling today and my opponent summoned obelisk the tormentor, it shouldn't have happened but it did thanks to swords of revealing light. I drew Nordic Relic Laevateinn and quickly played it, when he destroyed by monster and I activated it he claimed it didn't effect Obelisk, but under the rulings of Nordic Relic Laevateinn it is said that Royal Decree wouldn't Negate it so that should mean that Obelisk's effect shouldn't effect it as well right?