The 3 God cards have unique effects.
Use cards that can Special Summon and be tributed for one of the God cards (Ex. Dandylion, Fiend's Sanctuary, Zoma the Spirit).
Their EFFECTS are written on the cards. The classic versions however cannot be used in the first place.
you can find the god cards on ebay and amazon
Egyptian God cards can be Special Summoned from the Graveyard. However, their card effect states that, "When this card is Special Summoned, it is sent to the Graveyard during the End Phase" (according to the Yu-Gi-Oh! World Championship 2009 versions).
Yes, the wicked gods can destroy the god cards.
No. God Cards are not legal game cards, so cannot be used in tournaments.There are a few legal god cards like ra and obelisk but not slifer not yet
No. The god cards are stronger than Exodia.
God Cards are not legal game cards - they have no text because there is no game text to go there.
Yes the three Egyptian god cards can fuse in to The Creator God of Light, Horakhty. The Creator God of Light, Horakhty does not exist as a card and is only seen in the anime The god cards are real and you can buy them online. They are however, Illegal to use in any tournament. If you want to use god cards in tournaments, you would have to use the legal versions of them, and so far only The Winged Dragon of Ra and Obelisk the Tormentor have legal versions.
yes god cards can beat wicked avatar
No, A Number or chaos form cannot be destroyed by god cards expect by another number card, spells, or Trap cards.
Cards that special summon other cards, will say where those cards have to come from. Cards that special summon themselves will only apply while in hand, unless specifically said otherwise.