How exactly is is flashed Kron stronger than Sunsteel? Both need to be killed with a very similar amount of damage. Only difference how Kron is split in two enemies, which only makes a notable difference in scenario where the forcefield prisoner is spawned. If the card is to get nerfed it should be because it’s in general too strong, not because of an interaction with a single faction card that doesn’t even make the card better than it already is.
Also since we’re talking about Flash? What is your opinion on Rawr? If you go on the right you can flash it which ends up in you getting a 3/5 pet (5 hp being A LOT stronger than 4) and you get a pet, possibly dex. Not to mention you could also play Rex or Bloodtear on the same turn. Do you want Rawr to get nerfed as well because it works well with Flash? How about Kyhmera? You can flash it twice and it will have like what, 2/13 chance to spawn a mechaz0r?
Because the way I see it, card is being uses exactly like it was supposed to. To ramp up minions that benefit from it in one way or another. If that is “OP”, might as well remove the card from the game entirely.