Unfortunately for this mechanic, Tempest was filled to the brim with new ideas
You knew that Sorrows Path was coming, as its been the poster child for worst-of-the-worst since it was released
Its a six mana hand-refill on a body, every time it enters or attacks, for whatever type-matters deck you want that can play blue
The stats aren't worth the cost, but its enter-the-battlefield ability is a game ender: all creatures you control gain trample and +X/+X until end of turn, where X is the number of creatures you control
There are seasons, and people who place high at the end of the season can win prizes
Information on Quest was sparse, but Richelle did tease there'll be a component of Quest that will involve characters at the Disney parks