In terms of attack, yes, "Obelisk the Tormentor" and "The Winged Dragon of Ra" (if it has enough attack) can beat "Stardust Dragon".
However, if you are referring to the destruction effects of "Obelisk" and "Ra", then "Stardust Dragon" does "beat" them since it can negate their abilities and destroy them.
if you sacrifice ra and slifer while obelisk is on the field obelisk wood have infinite attack and nothing can stop him
The card you are thinking. The fusion between "Slifer the Sky Dragon", "Winged Dragon of Ra", and "Obelisk the Tormentor" is called "The Creator of light, Horakhty".
The Winged Dragon of Ra is basically the strongest because while Obelisk and Slifer have a fixed amount of attack points, the Winged Dragon of Ra has infinite.
obelisk
obelisk the tormentor the wing dragon of ra slifer the sky dragon
if you sacrifice ra and slifer while obelisk is on the field obelisk wood have infinite attack and nothing can stop him
TARRASKUE
The card you are thinking. The fusion between "Slifer the Sky Dragon", "Winged Dragon of Ra", and "Obelisk the Tormentor" is called "The Creator of light, Horakhty".
Obilisk the Tormentor, Slifer the Sky Dragon, and Wing Dragon of Ra.
The Winged Dragon of Ra is basically the strongest because while Obelisk and Slifer have a fixed amount of attack points, the Winged Dragon of Ra has infinite.
3, slifer the sky dragon, obelisk the tormentor, and winged dragon of ra.
slifer the sky dragon, obelisk the tormentor, and the winged dragon of Ra
the real winged dragon of ra has a yellow back also a real obelisk has a blue back and the real slifer has a red back i know this because i have slifer the sky dragon plus i have seen obelisk the tormentor and the winged dragon of ra
Obelisk The Tormentor, Slifer the sky dragon, and The Winged Dragon of Ra
obelisk the tormentor slifer the sky dragon the winged dragon of ra
Obelisk the Tormentor Slifer the Sky Dragon The Winged Dragon of Ra
Under no circumstances. The "Winged Dragon of Ra" Card is a card that you are not allowed to play officially, since it has not yet seen a official release yet. There is a official version of the Winged Dragon of Ra - Card, but it is not yet released outside of Japan. And even if it is the official Winged Dragon of Ra (though if it is in Japanese you're not allowed to use it anyway), Stardust Dragon is the better choice. So I advise you to keep your Stardusts!!!