It taketh and it giveth away
How to Play The Best Emerald/Sapphire Deck Hiro Hamada, Robotics Prodigy , lets you search your deck for an item and put it on top, while Gyro Gearloose, Gadget Whiz , will let you take items out of your discard and put them on top of your deck - a perfect way to get Pawiscle back after Hiram Falversham banishes them
Mishra, Tamer of Mak Fawa is by far the most useful when combined with Ashnod the Uncaring
You can take infinite turns with Second Chance, for instance, or make infinite mana with Displacer Kitten and Lotus Petal
I think itll excel in decks like Lathiel or other Selesyna lifegain decks, and is worth a look in those builds
Everything that follows is just my opinion, but I at least did some research for you first