I used gems and got Russell. He doubles, and it slightly better at creating power-ups than Dug, but that's about it. (You chose one of several pre-selected areas of the board, then Kevin shows up and eats those emojis). The event is dragging, just because some of these chests take 200 or so balloons, and at 15-20/game on average, even doubled it just feels like a slog. Plus, on a good game with Russell, I get 20 or more pre-doubling. On a bad game, I don't break 10. And it doesn't seem like there are many games in the middle - it's either really good, or the board is dead, and I score almost nothing.