These Job artifacts will not only provide new bonus abilities to the creature it is equipped to, but also add additional creature types - the White Mage's Staff card will turn a creature into a Cleric, or Wizard for the Black Mage's equivalent
My individual opinion of a card also wont be colored by my thought that the number of Treasures in Commander is just too damn high
If it's not for you well, there's plenty more of interest on the MTG release schedule.
The new Alice, Accidentally Adrift has an ability that can reduce the Strength of one opposing Character by 2 upon questing and this can be definitely reduce the risk for your Characters to be banished
Shockingly, when you look at all of the cards seeing play in Standard, Harsh Mentor misses on a great deal of them, but even if it does, a 2/2 for two is still reasonable