Shuffle your hand, library, and graveyard together into a new library and draw a new hand of seven cards, leaving all cards in play where they are
Batch shufflers are more expensive, but can avoid the problems associated with some continuous shufflers, whereby the shuffling operation only slowly changes the state of the deck, and new cards may be taken before shuffling has sufficiently randomized the pack, allowing some players to "shuffle track" cards through the shuffling process
Youre even guaranteed to pull a valuable Pokemon Ex card from every Deluxe Pack, which seems like a pretty good deal on the surface
Top 3: Not enough to choose from
Both of these mechanics are fine
This strategy can also include other permanent types and/or abilities that trigger when a permanent leaves the battlefield