My usual deck was a nice Psychic one with a lot of damage counter manipulation courtesy of Gengar's Curse, I seem to recall
Doubling your Rabbit tokens is a simple but effective way to pull ahead of your opponents and works particularly well with other token producers you might run, like Adeline, Resplendent Cathar
When I have as few as two colors in my deck, like in this one, I prefer to include lands that I know are going to produce my colors
Three mana is a lot, but four damage is a large chunk of the opponents life total, making it a consideration for burn decks in lower powered formats
Clear text and simple layouts work best
The effect stops Raya, Leader of Heart from receiving any damage when she challenges a damaged character - making the card a great way to pick off cards left smarting by your other challenges or card effects