While it can be used just to steal useful effects, the true depth of this enchantment lies in the bizarre combos it enables
The Japanese version of the card clearly depicts Gengar standing within a graveyard with several cross tombstones, while these aspects are removed from the English version entirely, leaving Gengar standing in a non-descript area
Avoiding cheating in your miracles deck is one thing, but in order to not give away information, competitive players must now draw every card like they might stop and cast a miracle even if theres zero in their list
It lets players ramp into a six mana Demon the turn after its played (like say, Bloodthirster), and even gives them Haste
Loaded with cards that can strengthen various decks
I think that both solutions were used, namely the first for the 1st Edition print run (which may have already been printed when the error was discovered) and the second for the Unlimited print run