You cannot use it to protect Wrenn and Realmbreaker the turn it comes into play, making it more of a turn four play if you are relying on the land to keep your planeswalker safe
Necrodominance restricts your maximum hand size to five, which can be offset with infinite hand size cards like Reliquary Tower
Because of Transform, this has a fair number of targets against black, red, and green decks, but Id be reticent to run more than one at the beginning of the format
Hildibrand Manderville would have been a really interesting card to see in the main set, at least mechanically
Tawnos, the Toymaker BPhillipYork: Fun and flavorful, there's a lot of really solid low CMV birds that would be fun to clone
Synergic with counter and draw due to the flash, good at hitting planeswalkers both before and after they hit the board