Exactly what the title sounds like. One person posts a (Yugioh) card they want remade (either it's too weak, it's broken, it's an interesting normal monster, whatever) and the next person writes a different effect for it which still follows the original theme and purpose of the card, but is more balanced, appropriate, or useable. You can also change the stats, attribute, etc. if you think it would be better.
Please make significant changes to the card - changes that you can see impacting the way the card is played in some way. If your edits change nothing, you're missing the point of this game.
I'll start with: Winged Dragon of Ra