For just one black mana, you get a whole new hand of cards - that's absurd
This is where the hardest ask of the keyword design process was, where I wanted it so every pair has a card in the shared colours that rewards both pair parts for their mechanic but isnt obviously great for everyone else
There is another promo version of Mickey Mouse, Brave Little Tailor, that is serialized and printed in gold foil art which is only given out to winners of the world championships
These two cards dont give you a Squirrel payoff, but they both give you Squirrel tokens
Nefashu passing out -2/-2 to five creatures, -1/-1 to ten, or somewhere in between would wipe parts of the battlefield nicely
On the opposite end, if you only put big, beefy creatures in your deck, you wont be able to play anything for the first 3-4 turns of the game