It is quite another to cast Cathartic Reunion, mill over half your deck, then cast Dread Return for free, putting some giant lock piece like Iona, Shielf of Emeria onto the battlefield
Being the only game in town for no-art lands would make Unstable more similar to Unhinged or Unglued , where if you wanted a certain subgroup of basics for your deck, you pretty much had to buy the set (or at least the lands from the set, which would force someone else to crack a box of the set to sell them to you)
To make your cards abilities sound legit, look for cards with similar effects
Card Set(s) -ROYAL BLOOD- [OP-10] CARD VIEW OP10-078 | R | EVENT I Do Not Forgive Those Who Laugh at My Family
Commander Legends Release has been rescheduled for 11/20
The cost of this card fluctuates widely, but in mint condition, its selling for $1000.00