mrtamtamia

Shadow worm or Harvester, Couldn't get rid of the 'shadow'/'purple'/'dark' type of decks and I always play those type of classes in any game!
 
Edit: Hence the SIG

To me. It's ofc. Twilight cards.
but most importantly, this combo.
Infected tower to change all my crappy units into twillight.
fleshbender to change all my enemies units into twillight.
And the Twilight curse to empower the scrap who needs it, or the tainted version on the enemy 

Mine is Rifle Cultists as well because i was a free player and used them alot in the beginning until a friend gave me some better cards and i started to trade a bit. You could made a lot of damage with their abilty. I LOVED it, sneaking to the enemy and then from pretty far away boom. 

Mine probably nasty surprise but hard to limit to just one, I loved the game as a whole

Worldbreaker Gun and Frost Battleship
 

For me, i think it would be ashbone pyro (and their bff viridya).
Loved that combo in pve with viridya keeping them around between fights

That is easy to answer:
I had so much fun using them (specially to punish assholes and kick them out of the game for builing others - like orb stealing etc.)

My most used card ever xD Firedancer

Worldbreaker
I have always loved heavy artillery.

which card gives you the most nostalgia when you look at it or remember it.
mine is either avatar of frost (it was the first "expensive" with high power level card i bought) or frost mage. 
 

Tremor, cause i like her Sound.  

Magma Hurler
but i have no idea why ^^

Avatar of Frost, but there are soooo many frost cards I like  uhh can't wait to build my pure frost deck again
 
 

just cant decide.umm maybe.. all of them

Forest elder cus its the card that i got from my first booster and as a f2p player it got me a lot of value so i was able to afford a lot of cards after selling it :/ So yea my favorite card got me a really nice boost but was sold. To get a whole deck i sold my best card so to say "the needs of the many outweigh the needs of the few".

Construct for me, THE coolest card ever. How it can independently walk and shoot at the same time looks so beautiful.

I guess the Windweaver will give me the Chills when I finally play them again

Ravenheart because im still salty over some guy scamming me out of mine. 

Northguards and tremor haha, also Avatar of Frost.
Northguards and tremor because they were the first units I ever got and Avatar of Frost because i remember sitting there when i first got the game wanting that card so bad and when i finally got it, i loved it so much

forest elder for me