Slightly modified this deck for gauntlet:
https://eternalwarcry.com/decks/d/JUDpWXzdurs/plain-ol-mono-shadow
This deck can win by killing things and smashing face, but the only actual goal vs. AI is to combo sow, karvet, and severin. I've lost two games in 7 runs so far, one boss and one regular. The deck may actually be pretty good vs. gauntlet, it usually wins at 50+ life.