Maybe half-way on topic, half-way OT, but on the two-card kingdom {Enchantress, Rebuild}, is Enchantress a counter to Rebuild?
Against a scripted Rebuild bot, yeah, I think so. But against someone who knows what's coming—I mean, if it's me playing Rebuild, I guess I pile up on Enchantresses. Feeding one to play my Rebuild seems great. Having Enchantress without Rebuild means I play it, making me that much more likely to pair Enchantress with Rebuild in my next hand (or just hit $5 for an extra Rebuild). With a bit of luck, my Enchantress can even shut their Enchantress down.
So the anti-synergy between your Enchantress and my Rebuild is maybe not as harmful as one would first think, which itself is harmful to you? Maybe?
I should probably go test that; this is pure speculation.