Yes, Trade only.
Thalnos does everything you want in this deck. It's a hard card to replace since it provides spell power, card draw and the deathrattle synergy to boot. My inexpert opinion would be to replace him with card draw.
I may be able to get behind -1 shadowcaster, +1 Edwin VanCleef! My only concern is taking away some of the pieces of the main win-con. I like loot hoarders just because they contest the board slightly more, and you get the loot hoarders back with N'Zoth as, hopefully, 5/5s.
Your choices are justified, and it's hard to say what's better without seeing the meta! My logic is with envenom and slayers we may have enough hard removal for the larger minions including taunts. In the list I run initially, I am going to replace mimic pods for fan of knives and moroes/ -1 taunt ele for +2 backstabs. From there I'll look for any weak links to replace for SI-agents just because the value you can get with them and shadowstep/shadowcaster is bonkers. We'll have to play it out to see!
-2 mimic pods, +2 fan of knives
-1 tol'vir stoneshaper, +1 backstab
-1 moroes, +1 backstab
It's going to be a blast tinkering around with this deck! It looks very promising the more I look at it!
I recommend not adding thistle tea! It is way too slow and sacrifices too much in favor of a gimmick. The amount of 1/2 elementals you generate is enough as is imo.
To start I want to say that I love this deck! Obviously, people have caught on to the synergy between firefly and the rogue quest, but I believe your list, on paper, has the best optimization of cards and numbers of cards in it. Which is a problem for me, because it's air tight. I'm having a hard to wrapping my head around playing rogue without backstab. It's the staple early removal card, and combo enabler that other classes wish they had! Whether it is right to include it or not has yet to be proven, but I cannot decide on what to replace it for. I've considered subbing out cold blood for it, but then you ruin part of the sally synergy, that I think is great. Now I'm thinking maybe given the low amount of typical rogue battlecry minions, SI-agent primarily, you could even go without shadowsteps. This seems crazy to take out for the idea of the deck, but the more I look at it the more I convince myself the quest wouldn't be too difficult to complete without it. It's a slower deck which doesn't need to be completed quickly when you have enough removal to back it up. If you could tell me your thoughts I would love to theorycraft with you! :)
Edit: now I'm thinking the moroes is a "win-more" card and can be exchanged for 1 backstab. I would still like to find room for another.
I've had success with mine around rank 3. Shaman seems to be stupid strong right now! I'm glad they got some (a lot) of love this expansion, but I hope some of the other decks pick up speed to challenge shaman!
The Idea is to establish some early control with your tempo cards then stall with freeze to search for your late game cards or combos to finish off the opponent. Emperor is a great way to reduce your one-mana and other cheap spells to either 0 or an even lower cost before to help combo with antonidas. Mukla is here for the bananas. I really want to use shatter, but want to keep the deck more midrange than the typical freeze mage. I would love some help and am open to ideas!
This is what I'm working with:
Click on the buttons to change the PopCard background.
Click on the button to hide or unhide popcard elements.