Forum:Six Attribute Reptiles

I have 3 of the six attribute reptiles, Firestorm Prominence, Umbral Soul, and Silent Abyss, but I'm a little confused about their effects. They all have the effect "When this card is destroyed by battle and sent to the Graveyard, destroy all face-down and non-(certain attribute) monsters". So, does that mean it destroys both all face-down monsters and also all monsters that are not the listed attribute? Or, does it mean it destroys all face-down monsters that aren't of that attribute and any face-up monster of the attribute is unaffected?