If two-thirds of the Planeswalkers are bombs, this is going to be one difficult format to balance without also pushing the power level of creatures and interaction pretty hard
You can make this go that much further to being one-sided by running a bunch of Vigilance, or putting into the flavor-of-the-month deck: a vehicles deck
Andy from the Scrap Trawlers here, ready to give you the lowdown on a very high-mana precon
Yes it saves mana on mutagens, but cracking clues for , incubator tokens for , landers for , or blood tokens as free rummages
You see, the DCI and players alike didn't immediately catch on to the power of Balance
Sword of Forge and Frontier An interesting card that was actually designed by a fan years before Wizards got round to it, this 'Sword of' gives protection from two-fifths of creatures, and has two very relevant ramp and card advantage abilities