Doing that gives you some awesome potential cards that benefit from creatures entering the battlefield in the reverse way by damaging the opponent instead of gaining life for yourself
This three-mana 1/3 allows you to ninjutsu it onto the field for one blue and one black as long as a creature you attack with is unblocked
If X is 10 or more, instead shuffle your graveyard into your library, draw X cards, untap up to five lands, and you have no maximum hand size for the rest of the game
Youll always find original cards, even singles and bundles, from sites such as Magic Madhouse, Total Cards or even sites that provide excellent resources for collectors, like TCG Player.
If an effect directs you to draw, take the top card from your library and make it the top card of your hand