It's even better in an Izzet (blue/red) or Boros (red/white) deck that plans on blinking creatures, as you can blink your largest creatures to repeatedly trigger Terror's second ability
Proliferate [-2]: Target creature becomes a Treasure artifact with " , Sacrifice this artifact: Add one mana of any color" and loses all other card types and abilities
If not, even the single card you're most after can be sent back, and sometimes it's more important to get a good mix than it is to find any one card in particular
Ral, Monsoon Mage and Ral, Leyline Prodigy are pretty interchangeable with this rank, but a little more nuanced to use, and with lots of upside
Youd make this decision with the assumption that youll be playing a very long game and that you can afford to stall on hitting land drops a bit more without fear of getting run over
The more equipment attached to Kemba, the more Cat tokens you get to create at the beginning of your upkeep