The Staff of Chen

{2}{b/g}{b/g}, {t}-Remove one +1/+1 counter
from target creature and put a Force counter on
The Staff of Chen.You can replace the
Force counter with a +1/+1 counter and put it
on a creature you control. Activate this ability
only when you can cast an Instant.
'This staff would help me to conquer the world!'-
Chen, the clever trickster