Honestly, not as promising as the Dark Confidant version. The Dreadnought/Stifle plan ends up being a little too risky without any source of card advantage. I think a traditional UB Shadow list would end up being more viable with Gurmag Anglers. I'm still in the testing phase (goldfishing) but it doesn't feel as strong of a Dreadnought deck as it is a Delver deck.

I'm concerned about the saturation of Veil of Summer in the format. It means that spot removal/discard gets a lot worse. If that's the case, and I still don't shelve the deck and move to another strategy, then I think Toxic Deluge becomes necessary. Veil doesn't do anything other than cantrip against Deluge.

I'm keeping tabs on BUG and Grixis Delver for a little while, BUG especially seems to be doing well. Whether that continues will give me an indication of how good blue/black strategies are positioned in the format.