So, this is a 4 faction control deck that's made to abuse the cost reduction from the event but also works just fine on its own.
However, the cost reduction allows us to play the most efficient answers in all our factions while also playing threats that take over the game by themselves like Maiden and Cirso. Since we don't play Justice we use the traditional Witch Harbinger package as it is all the more potent when we can play our BSH by turn 5. There is also nice synergy between Witch and Rockslide and obviously Lightning Storm. We play 7 cantrips in the form of Quarry and Trailblaze to smooth out our mana, and also dig for the variety of threats /answers being in 4 factions provides. I could see much more tuned builds of this deck run even more cantrips but since this event presents an unknown meta, I felt like just playing the widest range possible was the correct choice.