In any deck thats heavy on red cards, she essentially lets you draw a card for a +1, which is a really big upside on a three mana Planeswalker
If you have plans to create a dalmatian-deck - or any amber deck using Into the Inklands cards - you cannot leave out this card
Ninjas were the most successful and well-liked aspect of the original Kamigawa block, and until we started adding more Ninjas through supplemental sets, Ninja of the Deep Hours was the one most responsible for flying that hard-to-detect flag playing significant roles in Pauper and Cube as well as Commander
Pre-release discussions haven't included foxes as a significant creature type in the Bloomburrow set
Being in Mardu colors grants you a ton of options for sacrifice fodder
Face Commander, Bello, Bard of the Brambles is a 3-mana 3/3 raccoon bard that turns all non-equipment artifacts and all non-aura enchantments into 4/4 elementals with haste and indestructible