Jobs come in the form of special equipment artifacts with the 'Job Selected' mechanic, which will create a 1/1 hero token when the card is played, with the equipment automatically equipping to the token
Mana Vault is a card that has seen huge success over multiple formats because of its simple yet powerful ability when tapped to grant you three colorless mana for a single mana
Based on what Rasmussen said during the stream, it seems Power-Up will be one of the core mechanics of Marvel Super Heroes
You can't look at them beforehand though, so you've really got to use your finely-honed instincts to find the card you need
Ill probably give this a whirl in my Zirda, the Dawnwaker deck, since it will discount that four-mana activation
And, without some substitutions, the starter deck can't stand alone against competitive custom decks either