I like casting lots of spells and maybe winning.
0 cost spells are broken, especially when you get to play 7 of them and draw a bunch of cards.
Psychic Scream into 2+ Grave Horrors (can draw more with Stonehill, or random Seances from Lyra) will maybe win the game.
Landing a questing adventurer for actually one turn will maybe suddenly win since it can become unkillable.
Dragon Soul + Radiant + Lyra will fill your board pretty trivially because you have SEVEN 0-cost things and anything that costs 1 will also cost 0.