I just want to note that Arcane Lab can be brought in against Dreadstill to stop its namesake (the Dread part, not the Still part). I'm not sure how good it is, especially against Goyf Dreadstill, who can just ignore it and play Goyf beatdown. But against non-Goyf lists, cutting their options down to Factory and Trinket Mage beats might be worth it. Probably not though.