Greetings,
Here's a deck I've been using to grind the Spark achievement. There aren't many great Spark cards, but I tossed in what I had. I also tossed in a copy of
Molot & Nakova for fun. I've been wanting to play with this card for quite a while, and this deck can play M&N consistently. Grinding for this particular achievement is a chore, but this deck is fun and does well in gauntlet.
Ideally, you'll get
Warding Beacon out ASAP to trigger all of your Sparks early. Also, beacon +
Riva, Crimson Blur +
Kindle means potentially getting M&N out pretty early.
Getting lucky with
Crimson Firemaw can get Omni out early (or M&N).
You can probably optimize the deck by getting rid of Riva and Firemaw. I have them in mostly for mana ramping and Spark activating.
Discover Talents isn't necessary. I tossed in 2 because I had them. It's a toss up as to whether I inscribe or snag M&N. Between Talents and
Skyward Seer, I was able to have M&N in my hand ready to go pretty consistently.
It's really satisfying getting M&N out, especially when it's only turn 5-6.
Anyways, this achievement is a slowish grind. This deck made it more enjoyable for me. I was generally getting 3-5 Sparks per match, sometimes a lot more if I dragged out the fights.