You cannot use "Stardust Dragon"'s effect against this card, since it is not certain that a monster will be destroyed.
When resolving effects like "Snipe Hunter" or "Morphtronic Celfon" which require rolling a die, you must use a six-sided die. You cannot use a 12- or 20-sided die, etc.
Previously Official Rulings
These TCG rulings were issued by Upper Deck Entertainment and have since been deemed unofficial by Konami. They were previously considered official and can still be correct, as long as they follow the official gameplay rules, or unless Konami has issued a ruling that says otherwise. References: 
↑Konami Judge Program Rulings are considered unverified, as their source(s) are not publicly viewable. They are not confirmed as applicable to the TCG until they have been officially published by Konami.