Just played a game on Isotropic with Margrave and Horse Traders. A few times I would reveal a HT in response to my opponent's Margrave, set it aside, and then draw another HT. My initial expectation was that I would be able to reveal the second HT as well, since we were still resolving the attack (kinda like how you can reveal a Chapel that you have pulled into your hand with Secret Chamber). But that's not how it works on Isotropic, and I guess it makes sense since the moment "when another player
plays an attack card" has passed, but I find these temporal mechanics confusing. Donald, can you confirm that Isotropic has implemented the rule correctly? I promise not to start any more fights over the timing of reaction cards!