You get about 300 gems in savings if you pay with the blue stuff, and the pair of picks help you build cohesive decks more easily
Depending on how the format breaks, it would not necessarily be crazy to maindeck it, though its hard to justify spending three mana this way against an aggro deck
Seizan, Perverter of Truth Seizan, Perverter of Truth can be punishing, but this black commander also speeds the game up in an interesting way
It can be a little slow to close out the game, but its not much of a downside when the deck is so well equipped to play the long game
Still, it makes an excellent basis to build from, as there are so many directions you could push it
Ice Block majorly buffs already powerful cards You can also play the new and useful Sisu Daring Visitor to help get rid of characters your opponent has in play, or the handy Brawl card