Shuckle

Last Strike (This creature deals combat damage after creatures without last strike.)
Whenever Shuckle is dealt damage for the first time each turn, prevent that damage.
At the beginning of your combat phase, you may pay {w/u}{w/u}. If you do, switch Shuckle's power and toughness until the end of turn. It loses last strike and gains first strike until the end of turn.
Sacrifice a Berry: Create a Food token. (Food is an artifact with: {2}, {t