Hey Dan, been playing on Cockatrice for the past few days with this deck and I have to tell you I've been absolutely loving it!

There is so much you can do with this list it is really quite amazing. Fast combo or grindy control matches. Thrasios is the man. Leaving mana up for a counter but they didn't play anything relevant? Activate Thrasios. Someone just played a gamewinning card / combo but only have 5 mana, Tharios and a Vamp/Mystic Tutor in hand? No problem tutor that sucker up, draw with Thrasios and bam you're not dead!

One thing I noticed is the lack of any draw 2 @ 2cmc like Night's Whisper. Had a Dday pile going and would've won if I had the card so I took Delay out in the hopes I ever had the same opportunity for that pile.

I'm so glad you've been enjoying it! That kind of feedback is what I'm hoping to hear. I totally hear you on the Draw 2 matter. I don't love cutting Delay, but I do think Night's Whisper has a place in the list. Let me know how that cut works out for you! I guess with Muddle in the deck now we're technically over on the initial number of counters by 1 so it wouldn't hurt to trim that part of the deck... hmmm....

Delay is a really good counter though. I got blown out by it in a game when I tried to Deluge the board at a crucial moment. Maybe it isn't the best cut and I haven't drawn Night's Whisper in a relevant moment yet so I'm not convinced. It may have been a niche opportunity in where I needed the card but I'll keep it in for a bit and see how it goes.

Always worth trying! Though I would honestly try and find a way to work Delay back in while you do try. Let me know if it turns out to be relevant for you!