The only question is whether you can keep them alive long enough to realize that value, given how desperate opponents will be to see them die 7
All you have to do is tap five of your Wizards, and you can smack an opponent for five life, letting you break through stalemates on the board or take an opponent out at the end of another player's turn
It was an experiment in creating a 'pack-cracking experience' rather than a draft-optimised product, and it split the player base between those who loved the bonus slots and those who found the randomness frustrating
Otherwise, you gain 3 life
Starfield of Nyx was created as a build-around card that would allow people to use all their Theros cards to make a new but thematically connected deck
Its return is poised to have a profound effect on Moderns artifact strategies with the addition of powerful new cards, including Urzas Saga and Kappa Cannoneer