An ability may require the player to spend a certain amount of Ink and/or Exert the card using the ability
Its just a good ability sitting there, waiting for us to use
There will be some folks who will want to play Vampire kindred with Olivia, as thats what shes best known for, and good news for those folks, you totally still can
It can also be repeatedly duplicated using Isochron Scepter, which makes it almost impossible for your opponents to put anything significant on top of their libraries
thread brought up a question I often ask myself which is if for some reason, you had to sell off most of my cards and could only keep a few, or even just one, which ones would remain? How would you answer this question
You usually want your removal in Commander to affect more than a single card from a single player, but as far as 1-for-1 removal is concerned, Aura Mutation's worth it