Back way when, Wizards didn't really make sure that there were ENOUGH playable limited cards in the common slots for sets (no one was playing much limited before the inception of the Pro Tour, around the release of Ice Age ), so horribly unplayable cards like Snowfall and Balduvian Shaman glutted the common slots of packs - and commons are where most of the meat of your limited cardpool comes from
The two-drop sorcery that's common will destroy any land and you'll draw a card, so it's a cantrip
It seems impossible to play the classic blue tempo deck in Modern these days, but a deck full of Hookblade Veteran and other cheap assassins in blue running Escape Detection, Flare of Denial and other cheap interaction cards seems tempting if probably futile
Apart from the new partner commanders and the four-color face card, you get two Esper commanders, a Boros commander, a UW Commander, and two mono-red commanders, all of which deal (at least, to some extent) with the artifact theme of the deck
It's important to push this extra damage, because otherwise Themberchaud could end up killing you along with your opponents
