Their only problem is they each can only be activated once per turn, and while some cards like Freed from the Real and Pemmins Aura are solid choices, both of which equate to basically pay one blue mana to commit a crime when attached to a pinger
This particular card allows the caster to remove the restriction on hand size, and draw cards instead of gaining life
You must also track how each became face down (manifested, cast face down using the morph ability, and so on)
When used early, or in decks full of instants, the delay on the draw is pretty irrelevant however in the later portions of the game it is a significant drawback
Kenrith, the Returned King Kenrith, the Returned King does it all: It draws cards, gains some life, and gives haste to your creatures
Bazaar of Baghdad As the second land in this list that doesnt tap for mana, this card allows you to tap it to draw two cards and discard three