It seemed to be a perfect fit for them as Oberyn, the Sand Snakes and the Dornish soldiers were shown to be highly skilled in combat
Chronomantic Escape is part of a cycle, but the blue and red versions, Reality Strobe and Arc Flicker, don't seem impactful enough to make it in the Commander format, so don't bank on seeing similar spikes for these cards
The package is next, usually consisting of Technical Machine: , Technical Machine: , and/or Technical Machine:
4 Ancient Cellarspawn Some Of The Best Parties Happen In Basements It's really easy to make cards cost less than their mana value in Magic: The Gathering
Note that cracking a fetchland counts as searching their library, so folks might not break that Terramorphic Expanse or their Polluted Mire unless they are needed, which is still a win for you as you slow them down
A cheap equipment that enters as a creature and does a lot of chip damage isn't too bad