I love this as an adjunct to other discard, and Thoughtseize is the best since it has the widest range of things to discard only lands cannot be chosen
Now in Commander Land, due to the color-identity rule, you can't run these tricks outside of a Commander deck that runs all three colors (so it would have to be either a five-colored deck or Temur)
A few people have caught on to the strength of this card
So an interesting question comes to mind - what's the longest chain of strictly better cards you can come up with
Dig Site Inventory + Homestead Courage Homestead Courage and the functional reprint Dig Site Inventory are excellent with heroic, valiant, repartee, and other aggressive mechanics that reward you for targeting your creatures
Due to that sets resounding success, I had high expectations for what these Commander decks could be