When will the legal version of The Winged Dragon Ra become English and what are true effects this card?

The English name of "The Winged Dragon Ra" will not change as it is already in English. Its full Japanese name is "Sora No Ryu Ra".

Here are the effects of "The Winged Dragon Ra":

[REQUIREMENT] Must first control this face-up card on the field equipped with "Egyptian God Slime", "Slifer the Sky Dragon" and "Obelisk the Tormentor".

[EFFECT] Once during either player's turn: You can inflict damage to your opponent equal to this card's original ATK (this is unaffected by the effect of a card. Cannot attack after that damage calculation.)