Tamiel's Feather

Tamiel's feather shimmers like gold and is cold
to the touch. The bearer's hand is encased in gold
while carrying the feather. The feather also acts as
a Transmuter's stone that can be changed during
daily preperation. choose the benefit from the following options:
•An increase to speed of 10 feet
•Proficiency in Constitution saving throws
•Resistance to acid, cold, fire, lightning, or
thunder damage (your choice whenever you
choose this benefit)