Mulligans
Aggro Mulligans
Against very aggressive decks like Odd Paladin or Midrange Hunter you want Ice Walker and Spirit of the Dragonhawk to stall the game and control the board for your cards like Coldarra Drake or Kodorider.
Inspired by Control and wanted to see if it can be improved. Took out Archmage Arugal and Book of Specters because it usually has a +5% chance of not generating any value or burning a card. I also took out one Dalaran Aspirant because if it sticks it can be a good card but usually is just a 4 drop with bad stats due to only 4 (potentially 6) cards having a synergy with it. As replacement I put Lich King since it is a good late game card that generates lots of value and eater of secrets due to the large amount of hunters and mages on ladder.
I had two card slots left and considered putting in a Book of Specters and Ragnaros the Firelord or some form of removal but decided unstable portal because it has good statistics is fun to use.
Combo
The most important thing is getting Coldarra Drake to stick for possible big tempo and board swings or face damage.
You then use Kodorider, to fill the board with War Kodo‘s, or use Fallen Hero to burst down a minion or your opponent.
Another possible use is by playing Ice Walker and Freezing the enemies minions and face in order to prevent lethal or stall the game for a card.
Personal Experience
I didn’t play this deck much but with my first run I was able to go 11-3 with this deck at Rank 7+.