Enabling you to see the top card of your deck has a limitless potential when it comes to a duel. This skill can be utilized using Dark D.D.(Dark Dimension) deck, which enable players to see which to discard and which not to. It can also be used for fun decks.
I run a FIRE Deck (yes, seriously) and I love using Hazy Flame Sphinx as Mai. You literally always guess right. I run a lot of own hand destruction, so I can special summon FIRE type monsters from my GY, at least one per turn, every turn.
This skill has a nice concept, but with the exception of the aforementioned dark deck, this skill is amongst the worst of skills (though not nearly as bad as draw pass, a skill so disgustingly bad it makes me wonder why the developers have yet to make a buff for this)
Underestimated skill. Can be used with Thunder Dragons, Jar of Greed and Skelengel. If you like the top card on the deck then activate Jar of Greed and Skelengel. If not, Activate 1 Thunder Dragon to shuffle the deck, then activate the JoG/Skelengel. :P