Additionally, if each player has no cards in hand, you may tap, pay one black, and sacrifice it to play the exiled card without paying its mana cost
This results in a pretty consistent draw 2 or 3 per turn cycle in the mid and late game
Additionally, red/white decks that focus on "going wide" strategies would boost Regal Bunnicorn as multiple permanents enter the battlefield
For example, you could choose an artifact creature as the artifact you're sparing, another creature as the creature, and an enchantment creature as the enchantment
That works out at roughly 3 rares and a little under 1 mythic per box, compared to the previous 89 rares and 2 mythics
Not only are they the two colours most associated with Food in general, in Bloomburrow the mechanic is the basis for the black/green Squirrel archetype