This card and the other ones with equivalent effects can be strong only in combination with the right cards, which unavoidably requires some amount of luck. The need of 2 tributes just makes this and the others impractical.
Silent Abyss is a little less bad than the others, since A Legendary Ocean's a card. (Granted, a card like Daedalus is almost always better, but still.) I also like the art of Silent Abyss. (The rest are fairly generic, though.)
I have a deck like that, using monsters that count as 2 tributes (Whirlwind Prodigy, Flame Ruler, etc.) and Joey's deck skill "Roll n Boost". Not very consistent, unfortunately, but in a tight pinch I can pull one of the reptiles out and if the enemy attacks, they could lose their whole field.
This card ``firestorm prominence`` has a mistake in your effect, the effect destroys all non fire monsters face down, but in the game this card destroys all monsters when is destroyed. I mean, destroy monsters face up. In attak or defense position. So, i hope you can correct it. Thank you