He is tagged with Storyborn, Villain and Dragon
Once you've decided on your wincons, everything else should build towards playing those cards
Brainstorm Brainstorm is arguably the best card selection spell ever and a definite top contender among the best blue cards MTG players frequently use for deck manipulation
LANDS Restless lands Lands that enter the battlefield tapped are generally worse than their non-tapped varieties, but these are priced better to move than the old Battle for Zendikar ones like Lumbering Falls, with the only loser being Restless Fortress to Shambling Vent and for the most part, theyre pretty cheap to activate to get in chip damage
I mean, that's not a design question
In EDH hes pretty nifty as he can really stymie opponents board development, and anything that sweeps a bunch of smaller guys away will turn him into a legitimate threat pretty quickly