Cadira, Caller of the Small Cadira, Caller of the Small, Regal Bunnicorn, and Pollen-Shield Hare all have one thing in common: rabbits
Its unlikely that Slicer can hope to achieve the same things in a Casual environment, owing to the larger average size of creatures and more removal/wipes being played
The interesting thing comes when you start targeting your other creatures with auras and even mutate creatures
A generic blister pack that contains a promo card, wont be worth as much because it is cheap to begin with, readily available almost anywhere, and the cards themselves usually arent that sought after
#1 Monster Manual Monster Manual is a super strong Commander card, and it comes in at number one on this list
Essentially, Nissas loyalty will tick up every turn as long as youre playing land and, since Nissa is black/green, playing a lot of land is very easy