The skill adds a random powerful card to your hand, and you do not have to have that card even in your deck and even in your card catalog. Here is a list of cards that are added to player's hand.
Can be used if your Life Points drop below 2000. In the Draw Phase, instead of doing a normal draw, a powerful card, from outside of your Deck, is added to your hand. This skill can only be used once per Duel.
Even though it is a great skill, it is not common due to the difficulty of getting it, but also because there are more decks based on other skills that are more consistent than this one.
PvP Best decks [6/26 updated!]
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How to beat/farm Yami Bakura Lvl 30 (unlock event)
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