Some of these cards are certainly better than others, but each one has the potential to see play if theyre not already warping the format
Lightning BoltLightning Bolt (248,335 Inclusions, 11% of 2,337,008 Decks) With that said, you'll never be unhappy to see Lightning BoltLightning Bolt, at any portion of the game
I would imagine Sarkhan's Unsealing would need to be renamed, since it explicitly references a Magic: The Gathering character, and the Eldrazi Kindred Instant Not of This World may not be a good thematic fit, but a Fight Rigging card themed after the Wall Market fighting arena would make total sense
I think Tifa's Limit Break is too situational to be actively good, but the thought of killing someone by doubling my 7/7 trample creature sounds kind of appealing